Thread: Thoughts on necks starting to split

Are you using bushing dies?
If so, are you just sizing .001-.002 under .315 as any smaller will be over working and hardening your necks.
If they are standard dies then remove the expander and see how much the necks are being sized under .315 as some standard factory dies can size the brass way under what you would expect them to before the expander pulls back through.

Originally Posted by Matt2308

Are you using bushing dies?
If so, are you just sizing .001-.002 under .315 as any smaller will be over working and hardening your necks.
If they are standard dies then remove the expander and see how much the necks are being sized under .315 as some standard factory dies can size the brass way under what you would expect them to before the expander pulls back through.

I’m using Redding comp dies. And full length. I’ll have a play tomorrow and see how much it’s working the brass with/without the expander

Originally Posted by Matt2308

Are you using bushing dies?
If so, are you just sizing .001-.002 under .315 as any smaller will be over working and hardening your necks.
If they are standard dies then remove the expander and see how much the necks are being sized under .315 as some standard factory dies can size the brass way under what you would expect them to before the expander pulls back through.

So I have run one through the die without the expander and it comes to 0.308

Originally Posted by dale

So I have run one through the die without the expander and it comes to 0.308

I don’t like using expander ball for that same reason it works the brass to much and need to change bushing size. I never anneal bass and get somewhere from 7 to 12 firings from 100 pieces of brass. Primer pockets give out before the necks and case wall do.

Originally Posted by dale

So I have run one through the die without the expander and it comes to 0.308

That’s a heap of extra and un-necessary sizing taking place and is certainly contributing to, if not the cause of your necks splitting.
Bushing dies with a .314 bushing would half the amount you are working your brass and extend its life considerably.

I would definitely suggest annealing every sizing with your current dies, but even this might not be enough to fix the issue.

Originally Posted by Matt2308

That’s a heap of extra and un-necessary sizing taking place and is certainly contributing to, if not the cause of your necks splitting.
Bushing dies with a .314 bushing would half the amount you are working your brass and extend its life considerably.

I would definitely suggest annealing every sizing with your current dies, but even this might not be enough to fix the issue.

Thanks for the info. Might look at new die.

Originally Posted by dale

Thanks for the info. Might look at new die.

Just change bushing size

Originally Posted by dale

Thanks for the info. Might look at new die.

If only

Originally Posted by Kelton

If only

Don’t be like that I also managed to pick up 100 adg brass to chase me further down this rabbit hole. And have been looking at a amp annealer. Fuck my life !