10mm brass won’t resize

[BLACKFINTURKEY]

Shot up about 200 sig 10mm rounds yesterday and started the reloading process today. I am using hornady 3 piece die set. After deprive and resize I can shove an xtp in the case by hand. The mouth diameter after resizing is .410-.420 with the occasional.390. I’ve adjusted the decapping die 3-4 times with no change!

I used these dues several years ago and didn’t have this problem with different brass.


Any ideas?

[xman59]

mike the cases before you resize them,, what pistol are you using? also mike some unfired rounds, ... if after you resize them they are too large the die may just be wrong, might need to check it

[cblackall]

Is the whole case oversized or just the mouth? The mouth should be oversized (belled) to allow bullet seating, which the crimp will take care of In the final step.

[M16]

Could be an oversize expander button. Hornady makes some good stuff but reloading dies isn't one of them.

Try removing the expander button and resizing a case. That should tell you if it's the button or not.

[bbqfan5909]

Using the crimp?

[BLACKFINTURKEY]

Using the crimp?

My die doesn’t have the crimp, at least from what I understand.

[TacticalCowboy]

My die doesn’t have the crimp, at least from what I understand.

I’ll bet it does. Read the instructions on how to set up the seating die.

[BLACKFINTURKEY]

I’ll bet it does. Read the instructions on how to set up the seating die.

Think I may have finally got the crimp to work. I was having problems getting a good crimp before. It would either crush the case or not have enough tension


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[Leverhunter]

Try a Lee factory crimp die. It’s the easiest to use.

[BLACKFINTURKEY]

Well I still can’t get the crimp right. It’s starting to get frustrating.

[BLACKFINTURKEY]

How do y’all test your crimp? I don’t load many loads that need crimping so I’m pretty green.

[M16]

How do y’all test your crimp? I don’t load many loads that need crimping so I’m pretty green.

I use a progressive reloader on all handgun ammo. So I have two separate dies for bullet seating and crimping. If you use one die. Seat all the bullets. Then back off the seating stem a good bit and work your way down with the crimp die until you find the desired amount of crimp.

When you crush the case you know you done went to far.

[cblackall]

How do y’all test your crimp? I don’t load many loads that need crimping so I’m pretty green.

Run your seating stem down, and seat your bullet to the desired depth. Back the seating stem all the way out, and run the die body down until it makes contact with the case mouth. It will be a pretty hard stop. Lower your ram enough to lower your die another 1/4~ turn. Start checking your crimp, lowering the die body in small increments as needed until desired crimp is reached. Once you’re where you want to be, raise the ram/cartridge all the way into the die and lower the seating stem back down until it stops against the bullet. At this point, you will be seating and crimping in the same operation. Measure the next few, and make sure everything is where it needs to be, and lock down the die. Sounds more complicated than it really is.

I’ll also second the Lee Factory Crimp die. It’s really easy to use, and does a finishing body size and crimp on your loaded rounds. Only downside is it’s another die change/step on a single stage setup.

[BLACKFINTURKEY]

I got it figured out finally, still had some inconsistencies in the amount of crimp case per case but I assume those cases could have been a little longer than others.

[xman59]

I got it figured out finally, still had some inconsistencies in the amount of crimp case per case but I assume those cases could have been a little longer than others.

those inconsistencies are probably caused by difference in case length,, just a tiny bit long will give a poor result and often a damaged case,, if the case is just barely short the crimp will be weak or maybe none at all