AR Loading

[chardog]

Never crimp AR-10/.308, AR-15/match .223 or .300. Thousands of rounds, no problem.

 

[hogpatrol]

As an experiment, take an inertia bullet puller and pull an uncrimped bullet. Give it one good strong whack on concrete and then check the OAL. Not scientific but you'll get an idea of how much force it takes to unseat the bullet with .002 neck tension.

I don't crimp any AR ammo.

 

[jepp2]

That is a very good crimp. Which die did you use to do it?

I would love to claim it, but that is factory ammo. I was just trying to provide an example of the degree of crimp. I feel that many folks that crimp, are using it as a band aid to solve a fundamental issue they should deal with first. I'm not saying don't crimp, just know why and what you are trying to accomplish with it.

I load the 357 Sig round, and most of the time when folks crimp this round, they have a fundamental issue of insufficient neck tension that crimping is never going to solve for them.

 

[Rsadams]

How are you sizing them and what die are you using?

Rcbs full length small base dies pushing the shoulder back .003 to .004 or so.. No problems just seems like some are snug and pop in while most just slide in as they should.. Brass prep is all done..
I think the problem is the hornady 55gr fmj with canalure bullets iam useing. They hold no candle to a better bullet. Also just useing at that time some remington.223 bras fired out of my gun. This time around it will be some IMI brass.

 

[Rsadams]

Thats why many of us use dies such as the redding full length bushing dies... you want to be able to control your necks to the neck tension you want.

On another note fl resize for an AR everytime. Annealing helps alot too. Good Case prep is paramount with an AR for consistancy

I feel my case prep is fine as posted above my components may not be world class... Just waiting on the time that the moneys right to buy an annealing machine. Right now iam just loading the brass 4 or 5 times and replacing them with fresh.

 

[Larryh128]

As an experiment, take an inertia bullet puller and pull an uncrimped bullet. Give it one good strong whack on concrete and then check the OAL. Not scientific but you'll get an idea of how much force it takes to unseat the bullet with .002 neck tension.

I don't crimp any AR ammo.

+1, I have never had a bullet move from recoil in an AR with no crimp. If it was a situation that I was exchanging fire on a battlefield, then I probably would.

 

[Shynloco]

No need to crimp unless you intend to store your ammo for a LONG TIME (YEAR)I've never crimped for any of my AR's and even stored some of it for a couple of years before shooting it with no adverse effect.

Alex