Best 300 Blackout Reloading Dies – 2024 Review

| Last Updated:
September 12, 2023

If you’re looking for the best reloading die for a .300 Blackout, you’re in for quite a task. However, the search process won’t be as complicated if you know exactly what to do and what to look for when you choose a good quality reloading die.

We’ll be taking a look at five of the best reloading dies for a .300 Blackout currently on the market. We have hand-picked each of these based on a few features and aspects that made them stand head and shoulders over the low-quality, cheap models.

Before we get started with our list, we’ll talk about what these are and what their purpose is. We’ll also give you a list of aspects to consider while you’re looking for one for your own .300 Blackout.

Comparison Chart of the Best .300 Blackout Reloading Dies

  • Two Full-Length Dies for Various Calibers
  • Made From Heat-Treated High-Quality Steel
  • Includes Locking Rings for Easy Fastening and Security
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  • Best Fits a .300 Blackout Rifle
  • Made From High-Quality Steel
  • Zip Spindle for Slippage Prevention
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  • Comes With a Sizing and Seater Die
  • Will Adjust the Case to Fit Your .300 Blackout Rounds
  • Seater Die Has Built-In Crimp Ring for Crimping Your Bullet Cases
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  • Made From Stainless Steel
  • All Kinds of Bushings Available for Different Round Types
  • Comes With a Bushing to Keep Case Sizing to a Minimum
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  • Made From High-Quality Materials
  • Comes With Two Pieces: Sizing and Standard Seating Die
  • Fits a .300 Blackout Rifle Perfectly. Also Available in Other Calibers
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What Are Reloading Dies and What Are They Used For?

If you’re a gun owner who prefers to handload their own rifles, then odds are you’re going to need a good quality reloading die. In fact, there are different kinds of dies for all kinds of purposes.

For example, there is one type of die that is used for resizing and depriming. This is a die that you’ll need in the first step of the reloading process. These will be the exact same size as your caliber of cartridges and will also reform the fired case back to their determined size. At the same time, these dies will push out old primer during the resizing process itself.

There will usually be a set of different reloading dies in one single kit (which of course, is exactly what we’ll be reviewing throughout our list).

Aspects to Consider Before Buying

Of course, we want .300 Blackout rifle owners to find a good kit that contains all the reloading dies they might need. That’s why it’s important to consider some of the aspects that we’ve listed below as part of your decision process. If you’re a first-time buyer, it’s important to use this list to your advantage. Here is a list of aspects you should consider based on some of the recommendations made by past buyers of reloading die kits:


Of course, we always include price to the list of aspects to consider. That’s because not everyone that owns a .300 Blackout rifle will have a lot of money to play around with.

However, there are reloading die kits available for those who are on a budget. These are not cheap, low-quality kits. You can get a kit that is more than reliable at a price that is considered affordable for most budgets.

What Caliber is Your .300 Blackout?

As mentioned, there are reloading dies that will often fit different calibers. So it’s important to make a note of which caliber your .300 Blackout rifle is. If you’re using an AR-15 style rifle, it can either be something that is a 5.56 or .223 caliber.

If you’re using something different like a bolt action, single-shot rifle it’s important to find a reloading die that can fit those caliber types. So be sure to find the reloading die that fits your exact caliber before purchase.

Additional Accessories

While it may not be required, you may need an additional accessory like a headspace gauge to ensure that the chamber headspace is at the right size for your .300 Blackout rounds. A headspace gauge will be able to determine whether or not your rifle is considered a "go" or "no-go" when it comes to fitting your .300 Blackout cartridges.

If your rifle is a no-go, it will need some headspace adjustments before it can even be used. Using a "no-go" rifle is considered potentially dangerous and can cause damage to your rifle.

Review of the Best Reloading Dies For A .300 Blackout

Below is a list of five of the best reloading dies currently on the market for a .300 Blackout rifle. More specifically, these are kits comprised of the types of dies that you’ll need for the purpose of handloading or reloading your rifle.

As you’re going through each of these kits on the list, read them carefully so you know what is included in the kit itself. You may find that it might be exactly what you’re looking for in a reloading kit. If one tends to stick out as your favorite, we recommend you do a little deep digging to make sure it’s a good investment on your end or not. With that said, let’s get started with our “best overall” selection:

Best Overall:
Forster - Full-Length Sizing And Bench Rest Seater Die Sets


  • Doesn’t Leave a Mark on Your Rifle’s Barrel or Muzzle
  • Super Durable and Will Probably Last You Years or Decades
  • Helps Achieve Shooters Acquire Better, Much More Accurate Shots


  • May Take Some Time to Get Adjusted
  • One Reviewer was Disappointed with the Bullet Runout
  • Some Have Complained About the Dies Possible Scratching the Cases

Next up, we have the Forster Full-Length Sizing And Bench Rest Seater Die Sets. Included in this set are two high quality dies that give you the ability to produce the same perfect fitting rounds every time you put it to good use.

These are machined with tight tolerances using high-quality steel. They also go through a heat-treated process to ensure that they are the toughest kind of reloading dies around. If they pass the test with flying colors, they have the potential to last you years or even decades.

These feature their own locking rings designed for fastening as opposed to relying on typical screws. Both of these are full-length and come in various calibers, including one for the .300 Blackout rifle.

If you’re a target shooter that is also a religious handloader, you’ll love to have these dies handy while you’re at the range. Even as a hunter, it will be good to have this while you’re spending a day out in the field.

Regardless of what you use your .300 Blackout rifle for, you’re going to need a set that will help make the reloading process simple for you. With that said, you might want to choose the Forster brand reloading dies if you’re looking for something that will easily fit and stay securely in place when fitted onto your rifle.

Bottom Line

The Forster reloading dies are considered to be an excellent alternative if the Redding set doesn't sit well with you. What impressed us the most with this set, in particular, is that you can fit these onto your rifle without ever having to rely on regular, old-fashioned screws.

Aside from that, this is a kit that is great to have if you're not only using for reloading purposes but also to make some adjustments that will further increase your rifle's accuracy. By the sounds of it, these dies can do it all. If you're looking for a full-length die kit that will get you through the year or decade, you’re safe to settle on the Forster.

Best For The Money:
Hornady Custom Grade New Dimension 2-Die Set


  • Lock Rings Fasten Without Issue
  • Precision Made for the .300 Blackout
  • Best Reloading Dies for a .300 Blackout for the Money


  • May Have Some Decapping Issues
  • Does Not Come With a Shell Holder
  • Some Have Complained About Issues Regarding the Zip Spindle

Next, we’ll be looking at the Hornady Custom Grade New Dimension Two-Die Set. If you’re looking for a set that will likely fit your budget, you’re probably going to want this one in particular.

These come with two dies that are made from high-quality material that is super durable and designed to last you a long time. In fact, these are excellent dies that make handloading safer and easier for you. That’s what the Hornady brand aims for.

The sizer die includes a zip spindle that is designed to keep it in place with little or no slippage. If you’re looking for a set that won’t give you grief when you fasten it and is guaranteed to stay in place, then the Hornady die set might be exactly what you need.

In fact, if you’re on a budget, you’ll be quite happy with this being a “you get more than you pay for” kind of set. That’s what we strive for with first-time shoppers. Even if you have money to play with, a budget die set might actually be the better choice for you compared to all the other kits.

Bottom Line

The Hornady brand has long been a reliable and trusted brand among gun owners for generations. They prove that by providing the best in accessories. This set, believe it or not, is one of those many reasons they're considered a very trusting brand. On top of that, they use high-quality steel for these dies, knowing full well that it may be the last set you'll need for a while.

And for the price it's going for, there's no way you could ever pass on a deal like this. If you're looking for a set of dies that will last you for as long as possible and satisfy all your handloading needs, the Hornady brand reloading dies might just be what you need.

3. RCBS - Full-Length Die Sets


  • Well-Machined Pieces
  • Seating Die is Easy to Adjust
  • Makes Resizing Smooth and Consistent


  • Might Be a Little Weaker Than the Older RCBS Models
  • Some Have Complained About the Decapping Pins Breaking Frequently.
  • Some Have Complained That the Seater Die May Not Do a Good Job in Terms of Crimping

Next on the docket, we have the RCBS Full-Length Die Set. This comes with your usual sizing and seater dies. Both of these are full-length dies designed to perform their intended purpose.

The sizing die is designed to adjust the body of the case so you can easily load and reload rounds each time you're about to use your .300 Blackout rifle. At the same time, it is designed to make sure that you have just enough headspace to fire these rounds.

By the way, if you don't have one yet, it's highly suggested that you get a headspace gauge to check if your Blackout rifle is a "go" or "no-go". In fact, a gauge and these dies will work perfectly with each other to make sure that your gun is safe to use and can fire the suitable .300 Blackout rounds you choose.

The seater die will ensure that the bullets are seated correctly before you begin firing them off at the range or out in the field. This has a crimp ring built in that is designed to crimp the case into the bullet itself. Of course, this is entirely up to you. All you have to do is either lower or raise the position of the die in the press that you use. Also, if you’re looking for a starter reloading set, the RCBS might be the set to start with if you’re a first-time user.

Bottom Line

For a set of reloading dies, the RCBS is perhaps one of the best sets on the market. And there are a few good reasons why we added this to our list. If you fancy yourself someone who likes to crimp their bullets, you’ll be quite happy to have a seating die that will help make the process easier for you.

As mentioned, the die itself is pretty easy to adjust. Other than that, if you’re looking for a set that will make handloading an easy task for you, the RCBS brand reloading dies might just be the best choice for you.

4. L.E. Wilson, Inc. - Bushing Full-Length Dies


  • Cases Very Consistently
  • Fits Perfectly with .300 Blackout Rounds
  • Does a Good Job Keeping Sizing to a Minimum


  • One Reviewer Had an Issue With the Alignment of the Cartridge While it Was in the Case Holder

For our last reloading die, we’ll be taking a look at the L.E. Wilson brand reloading dies for the .300 Blackout. If you want a full-length die designed to keep the neck resizing to a minimum, then you’ll want this kind of set.

The bushings of the sizing are designed to resize the cases, all while preventing the cases from becoming a little oversized. If you’re worried about “overworking” the brass in your cases, you’ll want a sizing case that will ensure that will never happen. So you would have to settle for a die kit like this.

You’ll have all kinds of bushings at your disposal if you ever need something that will be suitable for different types of bullets. If you’re happy with what L.E. Wilson can do with your .300 Blackout rounds, you might need one of these for your other rifle rounds like the .270 Winchester and a few others.

These are made from high-quality stainless steel designed to be easy to clean and built to last through every use. If you’re looking for a super strong, long-lasting kit, look no further than the L.E. Wilson Bushing Full-Length Die kit.

Bottom Line

We’re quite impressed with this reloading die, in particular. This does a good job making sure that the cases of Blackout cartridges consistently stay the same size. Not once did we see any kind of oversizing. So if you’re looking to keep your cases perfect and in the same size, you’re going to want to get one of these reloading dies for your own rounds.

5. Redding - Full-Length Die Sets


  • Will Fit Perfectly With the Right Caliber
  • Will Last You a Long Time and Will Work With New and Old Guns
  • Workmanship and Quality are Second to None According to One Reviewer


  • May Need Some Extra Lubrication Prior to Use
  • One Reviewer Complained About Having Bad Threads
  • Some Have Complained About Various Issues With the Seating Die

On the docket first is our choice for the best reloading dies for the .300 Blackout rifle. We’re giving this nod to the Redding Full-Length Die Sets. This set includes two types of dies: the sizing die and standard seating die.

This is available for the .300 Blackout rifle but is also available in other cartridge types like the .204 Ruger and the .221 Remington. If you’re looking for a set that will best fit your .300 Blackout rounds and will make it easy to load or reload, then you’ll probably want to add this set to your collection of gun accessories.

Bottom Line

For the title of best overall, these reloading dies are very deserving of the nod. If you’re looking for a reloading set that will make your handloading much easier, then you can go with the Redding Two-Die set.

These come with two simple dies that you can use for their intended purpose. They fit well and won’t steer you wrong if you use them properly. If you’re looking for a kit that is considered the best of the best, we say that the Redding kit is just that.

How to Choose a Reloading Die From Our List

Now that we’ve listed these five reloading dies, it’s important to know which one of the five will stick out as your favorite. With that, we’ve taken the liberty of putting together a quick guide to help you make the decision process an easier one. Here is what you need to look for while choosing a reloading die of your own:

One-Set Or Two-Set

As you probably noticed, there were kits that had two dies. One being the sizing die and the other the seating die. It is highly recommended that you get a kit that has both of them. Not only will you need a sizing die to keep the cartridges at the right size, but you'll also need the seating die to ensure that they are aligned properly and will be ejected straight through, as opposed to jammed up somewhere inside your rifle.


As you’ve also likely noticed, there are different reloading dies designed for different calibers. Obviously, you’re going to find one that will fit .300 Blackout rounds. That’s because you’ll need one that will give you a perfect size case every time you use it. Some of these will be able to fit empty cartridges perfectly without issue and won’t risk oversizing and render the .300 Blackout cartridge useless.

Brand Name

This might be an aspect worth considering if this isn’t your first time purchasing a die cast. However, some buyers have often considered the name alone as the reason why they chose their reloading dies. If you’re a first-time buyer, find out why names like Forster or Hornady are considered some of the best name brands to choose from when it comes to choosing a die for your .300 Blackout.


Finding the best reloading die for your .300 Blackout is no easy task. As long as you know what you’re looking for and what you want to accomplish with handloading, the search will be a little less hectic. Handloading is a type of loading procedure that most gun owners are more comfortable with. And we won’t judge you if you’re one of them. But we will say that if you want your handloading to go smoothly each time, it’s always good to find a reliable reloading die before going forward.

People Also Ask

If you’re a first-time buyer or need a refresher course on loading dies, we’ve taken the liberty of presenting you the following frequently asked questions. We have answered these questions in order to help make you aware of how reloading dies work, as well as some questions that will further help you with your final buying decision:

Which is Better: Carbide Or Steel?

One of the differences between the two is affordability. Carbide is more expensive compared to steel reloading dies. Despite being the more affordable option, steel can still wear faster than carbide despite being a very strong material itself.

To choose between the two: carbide won’t require the use of lube, whereas steel reloading dies may require some lube prior to use. In terms of which is better, carbide has the edge against steel for its ability to wear less and lesser need for lubricants while fitting. However, steel will usually be more budget-friendly.

How safe is Handloading or Reloading?

It can be fairly safe, but there is also the potential for danger.  Mishandling the reloading process is obviously considered not safe. But as long as you follow the rules and use the best safety precautions, you’ll be able to safely handload or reload your .300 Blackout rounds without any incident or injury.

Is Reloading Legal?

The short answer: yes. It is legal to reload your own ammo. Even better, you won’t need a permit for the purpose of handloading. However, it is wise to double check the laws in your town/city or state just to be on the safe side. 

Michael Lutes

Michael Lutes is the managing editor and owner at Gun Mann. He is a veteran, gun enthusiast, 3 gun competitor, and 2a advocate. Mike has a passion for innovation and education across the industry to create great content, training, and insights from the best and brightest.

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