150 g Load Questions

[mikel]

Hello all,

I've been shooting for years, but am new to reloading and am having some trouble getting started loading for my M1S AR.

I am using 150g Hornady bullets in front of 16g of Lil'Gun in once-fired Federal 223 brass.

I loaded three rounds into a magazine and got what looked like two good rounds but the last one had some serious overpressure signs. The case extruded into the ejector pin hole, and it looks like the base of the case was swollen out where it isn't supported by the chamber.

I loaded these rounds to 2.20 and did not crimp them.

I have several questions:

1) Is it possible that the bullet may have gotten pushed back in the case as it was stripped from the mag and loaded into the rifle causing higher than expected pressure?

2) Do most of you folks crimp?

3) Is anyone running a similar bullet with Lil'Gun? If so, what recipe do you use?

I got my starting load data from here: http://www.reloadersnest.com/unverif...ID=135&ID=2791

Since I fully acknowledge that I don't really know what I'm doing I'd appreciate any thoughts and advice anyone has on what I need to pay more attention to.

Thanks,
Mike

[sha-ul]

Sorry, caught in the spam trap.