Thread: Thoughts on necks starting to split

Originally Posted by dale

Thanks for the info. Might look at new die.

Just change bushing size

Sorry to hear about your brass.

For comparison, here are some neck splits on my Norma brass.
These were 2 failures from 134 cases I reloaded this week.
Its a 7mm08 using Redding FL dies and the cases have been reloaded about fifteen times.
I havent measured the neck dia before and after. I use an expanded ball.

Originally Posted by Bagheera

Sorry to hear about your brass.

For comparison, here are some neck splits on my Norma brass.
These were 2 failures from 134 cases I reloaded this week.
Its a 7mm08 using Redding FL dies and the cases have been reloaded about fifteen times.
I havent measured the neck dia before and after. I use an expanded ball.

Attachment 205001

15 times. Do you anneal every time?

15 times!!!! have you used a feeler guage????

I've had them annealed once.
Thanks heaps @10Ring he did half of them.

What's a feeler gauge ? what are you looking for ?
I think that's what I used to use on spark plugs.

I feel fortunate I haven't had to go down many rabbit holes.
Nor checked my own spark plugs for a while.

Ok firstly, is that a dent?



I've used three different brands of brass in my 7mm rem mag and had split necks with Federal and Winchester so far.

The Winchester necks split if you look at them funny I've actually had a few go on their first firing out the box, factory ammo! I had about 80 cases, different batches with half of it given very generously to me by my brother who does not reload. This brass has been loaded 8 or 9 times and is sitting waiting for me to get it annealed in an emergency when I can't get brass, primer pockets have held up well and I think I've got about 60 left and if I hadn't loaded so hot early on I would have quite a few more. The federal stuff, same again, different batches, some bought off trademe as once fired, and its been good too, I think only half a dozen lost to split necks with a couple to loose primer pockets, my fault loading too hot again

I recently switched to Norma and I've used the same set of RCBS dies the whole time I've owned the rifle and only just now been concerned about how much they are working the brass. Fired, the neck measures 0.315, sized without the expander its back at 0.300. expanded with the standard expander its at 0.310 and loaded it's at 0.312. I've only got one firing on this stuff, same batch bought brand new, very fancy

From what you guys are saying that's a lot of work so for Winchester and federal to stand up to that much work for several firings and have a pretty acceptable failure rate I would say you've got either a brass or chamber problem.

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 !