Chamfering angles and life

[wayward]

Hi guys.

When chamfering a case you can go a bit too far and sharper it if you know what I mean. And sharp equals thin.

No problem to load and fire a case you've gone a bit over board on, but having thinned the top of the neck like that are you significantly decreasing case life? Making it stretch a lot more and need trimming since it's thinner?

Or is it high enough it makes no difference?

[Jack V]

It's not a good idea but it will not increase stretching . What it can do is increase the potential to start a neck split if the brass is hard . Generally if the brass is reasonable soft it will not be a big drama . It could potentially affect accuracy slightly.

[Warrigul]

Hi guys.

When chamfering a case you can go a bit too far and sharper it if you know what I mean. And sharp equals thin.

No problem to load and fire a case you've gone a bit over board on, but having thinned the top of the neck like that are you significantly decreasing case life? Making it stretch a lot more and need trimming since it's thinner?

Or is it high enough it makes no difference?

Makes no difference at all.

[Tiiger]

Trimming excessively will shorten life, but I'm sure you're not trimming off several mm at a time.

If you accidentally 'sharpen' one it will come good in the next firing and trimming.

[Swarm]

Turn the trimmer down a few speeds if you're slicing away that much of the neck.

[SendIt]

Sounds like you're just applying too much pressure with the chamfer.

You're only trying to remove the burs, not remove any of the solid neck. A slight bevel on the inside is ok for ease of seating but not an all required.

Try a lighter touch.

[Khan]

You're over thinking it.

The case is going to stretch and need trimming anyway, if you take a bit off first time its just what you would have trimmed off next time anyway.

As long as the burs are gone and you're not going stupid on the case you're good.

[lole]

Just don't sharpen the neck and it's fine.