Hi
My 222 brass
Measurement internal Neck dia after sizing =.222 so about two tho NK tension
So think your right on the expander ball
👍
Hi
My 222 brass
Measurement internal Neck dia after sizing =.222 so about two tho NK tension
So think your right on the expander ball
👍
If it is consistent and you've not been getting any trouble leave it alone.
Do you neck crimp?
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Thanks, I'd have expected about .002" neck tension. Thing is I've gone and ran ALL my brass through these dies so didn't have an old sized case to check and compare.
I can't leave it alone, if the necks are too tight and won't fit on the case trimmer they're not much good!
I don't crimp unless there's a cannelure, and that's pretty rare, so no I don't.
Cheers
Greg
Have you measured the expander ball?
You do not need a canelure to crimp unless it is a roll crimp. We crimp match bullets for use in AR15s regularly which improves consistency. Lee are quite clear on thsi in their instructions that you do not need a canelured bullet.
That said IF the bullet has a canelure, I will adjust the die to crim into it.
I'm a maggot in another life you know
I have a Lee factory crimp for the .223. I did some experiments with it and personally found no advantage accuracy-wise to crimping. It's an extra step and puts more stress into the brass. I've heard that it improves reliability cycling through rifles like the AR15, but that's not an issue with the type of rifle I have.
New expander button is on it's way, will update with results!
Cheers
Greg
It does seem a bit undersize, on various dies that I have had the expander has varied between .221 to .223, apart from Lee collet dies which had a .220 mandrel as they are squishing the neck onto a mandrel rather than using an expander to push a neck out that has already been undersized by the die.
Too much neck tension is usually avoided, but..., if the ammunition that you are making gives good accuracy with that degree of tension, I would probably take a little material off the trimmer pilot so that it fits the neck.
Many knock Lee stuff but I have been quite happy with the results from collet neck sizing dies.
Thanks for the reply. The sizes you have quoted sound right to me. I think it'd be way too much neck tension if it were left as it is. I've changed to this die set from one I was borrowing so it's the die set that's the issue, I'm convinced of it. I know it'd be easy to polish the pilot down a bit but I didn't have this problem before and would rather leave things as standard.
I think I'll get a Lee collet die set for what they cost. Once I've fired the fully sized brass I'll neck size using the Lee and see how they do.
Cheers
Greg