How To Bump Size Rifle Brass

If you are a reloader, sooner or later you will need to “bump” the shoulder of your brass back to factory new dimensions. This is especially true if you are shooting a semi-automatic rifle. The reason is that every time a round is fired, the brass is pushed back a tiny bit in the chamber.

Over time, this can cause the brass to become “set back” and no longer fit properly in the chamber. This can lead to failures to eject, feed, or chamber properly. Bumping the shoulder back to its original dimensions is a very quick and easy process that only takes a few minutes.

There are a few different ways that you can bump the shoulder on your brass. The most popular method is to use a Lee Reloading Die. This die has a decapping assembly on the bottom that presses against the shoulder of the brass and “bumps” it back to the original dimension.

Another popular method is to use a Forster Reloading Die. This die has a decapping assembly on the top that presses against the shoulder of the brass and “bumps” it back to the original dimension. Whichever method you choose, the process is very quick and easy.

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• Gather the supplies needed to bump the size of the brass
• This will include a set of reloading dies specific to the caliber being reloaded, a shell holder, a case lube and a means of measuring the brass cases
• Select the die that will be used to resize the brass
• For most 22 caliber rifles, this will be the Full Length Resizing die
• Place a small amount of case lube on a clean cloth or paper towel
• Rub the lube onto the outside of the brass cases, being sure to coat the entire surface
• Place the shell holder into the press and then place the lubed brass case into the shell holder
• Screw the die into the press until it is in contact with the shell holder
• Slowly run the handle of the press to raise the die and resize the brass
• Remove the resized brass from the shell holder and measure it to ensure it is the correct size

How to easily set up your FL sizing die precisely

Can you shoulder bump with a full length die?

Yes, you can shoulder bump with a full length die, but there are some things to keep in mind. First, the die will be more likely to roll off your shoulder if it is bigger and heavier. Second, the die may not roll as evenly if it is not a perfect cube.

Third, if the die is not perfectly balanced, it may land on its edge and not roll at all. Fourth, if the die hits your arm or hand while it is rolling, it may change the roll. Finally, if the die hits the ground too hard, it may break.

Can you bump the shoulder with a neck die?

No, you cannot bump the shoulder with a neck die. The neck die is used to create the neckline of your garment and the shoulder die is used to create the shoulder line. Bumping the shoulder with the neck die will result in an inaccurate neckline and may cause your garment to not fit properly.

Does a full length sizing die size the neck?

A full length sizing die sizes the neck and the body of the case. It does not size the shoulder.

What does shoulder bump mean?

Shoulder bumping is a greeting gesture that is common in many cultures. It is typically done by pressing one’s shoulder against another person’s in a friendly way. Shoulder bumps can also be done as a way to show appreciation or congratulations.

Credit: www.rifleshootermag.com

Shoulder bump vs full length sizing

When it comes to sizing dies for reloading brass, there are generally two different types: shoulder bump dies and full length sizing dies. So, which one should you use? Shoulder bump dies are typically used for bottleneck cartridges, such as the .308 Winchester.

These dies resize the shoulder of the brass, but don’t touch the neck. This is important for maintaining accuracy, as the neck is where the bullet is seated and needs to be kept in pristine condition. Full length sizing dies, on the other hand, resize the entire length of the brass.

This is typically used for straight-walled cartridges, such as the .45 ACP. Full length sizing can be beneficial for increased reliability, as it ensures that all of the brass is the same size. However, it can also lead to reduced accuracy, as it can distort the neck of the brass.

So, which one should you use? It really depends on your specific needs. If accuracy is your top priority, then shoulder bump dies are the way to go.

However, if you’re more concerned with reliability, then full length sizing dies may be a better option.

How to size rifle brass

If you’re a reloader, then you know that brass is the most important part of the process. After all, it’s what holds the bullet and the powder. But how do you know what size brass to use?

There are a few things you need to take into consideration when sizing brass for your rifle. First, you need to know the caliber of your rifle. This will determine the size of the brass you need.

Second, you need to consider the type of ammunition you’re reloading. Different types of ammunition require different sizes of brass. Once you know the caliber of your rifle and the type of ammunition you’re reloading, you can determine the size of brass you need.

There are a few different ways to do this. You can use a sizing die, or you can measure the brass yourself. If you’re using a sizing die, you’ll need to know the diameter of the die.

This is usually listed on the side of the die. Once you have the diameter, you can measure the brass and compare it to the die. If the brass is larger than the die, you’ll need to size it down.

If the brass is smaller than the die, you’ll need to size it up. You can also measure the brass yourself. To do this, you’ll need a ruler or a caliper.

First, measure the diameter of the brass. Then, measure the length of the brass.

How to measure shoulder bump

If you’re like most people, you probably don’t know how to measure shoulder bump. But, it’s actually quite simple. All you need is a tape measure and a friend to help you out.

Here’s how to do it: 1. Have your friend stand behind you and measure the distance from the top of your shoulder to the bottom of your chin. 2. Write down the measurement.

3. Repeat steps 1 and 2 on your other shoulder. 4. Compare the two measurements. The shoulder with the larger measurement is your “bump.”

That’s all there is to it! Now you know how to measure shoulder bump.

Conclusion

If you’re a reloader, you know that brass life is important. You also know that brass can vary in size, even within the same caliber. So, how do you ensure that your brass is the same size?

The answer is to “bump” the brass. Bumping is the process of using a tool to slightly increase the diameter of the brass. This ensures that all of your brass is the same size, which is important for accuracy.

There are a few different ways to bump brass, but the most popular is to use a Lee Universal Decapping Die. To use the die, simply run a case through it and screw the die down until it makes contact with the case. Then, turn the die another 1/8 to 1/4 turn and run the case through again.

This will slightly increase the diameter of the brass and ensure that all of your brass is the same size.