This is a question that is just going to open a littany of debate!My friend just bought a Springfield M1A Standard Loaded. It has been headspaced at .163 Can he shoot 308 Win. and 7.62 surplus ammo safely out of this Rifle? New Rifle never fired.GI1
Headspace and long cartridges (due to bullet length are 2 different things) The cut of the throat can be a all sorts of different cuts and distance from ogive to lands all sort of different distances based on bullet type and seating depth, BUT the headspace still the same. That is if you are referring to "long" cartridges in terms of where you seat your bullets or O.A.L...+1 on the articles. I shoot both with 1.631 just have to be careful on the really long cartridges. You didn't say exactly what your headspace was, is it 1.630 or 1.633 or what? A better headspace than mine for both commercial and surplus would be around 1.633.
What can I tell you? If the bolt wont close on a round you are going to have problems? There's really not much more to it in terms of headspace. Im not sure what you are seeking? If you have to cull rounds....you have to cull rounds.jameslawson71, let me see if I can explain what I mean by long cartridges. My loaded has a tight headspace of 1.631. I beleive this is a good headspace for shooting match ammo. I however like to shoot milsurp, mostly because it is cheap and I can pull the trigger more times. The ammo I have and can get is 762 x 51mm and I did read the stickies on headspace. What I do is strip the bolt guts and actually put each cartridge I intend to shoot into the chamber and see if the bolt closes on it. To my amazement about 5% of the rounds do not allow the bolt to close all the way. I cull these rounds out and shoot the rest. I do not know why some rounds do not allow the bolt to close but some are worst than others. In a couple of cases the bolt did not even go into battery. In those cases I was able to determine that it was case damage (damage that happened prior to getting to me). The rest of the rounds that won't close all the way at least close 50% or better. I realize that this method is not applying much pressure (only finger pressure) but I do know that not every round of surplus is equal. I'm pretty picky about what goes bang in front of my face but it is a drag putting every round into and out of the chamber. Anyone who has a better idea, I'm listening and I hope that helps wedge to understand what I was trying to say.