Mosin-Marauder
New member
The Prvi brass I am using Next is GTG, a lot thicker than Winchester/S&B brass.
Ahh yes, I knew it was coming. Headspace. Why would you risk damaging the extractor to check headspace? Actually, why would you even bother to check it in this case? The problem started with resized brass. These chambers were cut under wartime conditions, unless you have an older model. There IS a difference in the chamber size between the two. Wartime guns ran steel cased ammo and the chambers were sloppy. I have owned both and this is obvious when you fire a lot of ammo through them. I had a Finn Hex receiver that would not chamber some steel cased ammo at all. I don't consider 5 reloads bad at all using brass cases. As already stated, you can "Cheat" when you resize to extend brass life. I would look around for the company that makes the biggest brass. This helps a lot.
Case head separations are serious business.I see no real reason to stop shooting it/reloading ....
Case head separations and a "ring" around the case 1/4" or so from the base are signs of excess headspace. I don't know why folks seem to believe that rifles firing rimmed cartridges like the 7.62x54R or .303 British just can't have excess headspace. They can, and do. And just because those cases have shoulders does not mean the cartridge headspaces on the shoulder and that all will be well if some magic adjustment is made to the sizing die.
Have you checked the headspace/chamber recess against the case rim thickness?Headspace had been checked.
Twice.
this load shot well the first time, so I figured I would load a bit more and change to match primers.
I have no idea what prompted it to do this, but I am looking for any advice.
DON'T (!)I set up the die just like every manufacturer says to do,...