I have a PSL-54C that I have done about everything to, and on the first batch of Wolf 150 gr FMJ it would shoot sub-MOA everytime I put it in the Lead Sled, but on the second batch 2-3 MOA is normal. In the first box of ammo I pulled ,to reset fire-lappind bullets, the powder charge varied from 46.3-48.3 grs YES TWO FULL GRAINS, no wonder I'm having trouble. I know the PSL is not supposed to shoot heavier than a 150 gr bullet and you need the .310-.311 bullets but what do I do for brass? I had heard that the service rifle ejects really hard and brass will not hold up, but where would you buy steel / coated cases if that is true. Any help would be appreciated I hate to give up on this rifle and dump it. I have shot 400 yards several times at a buddies range that I built him and it would shoot 2 1/2 - 3 inch off the bench at 400 with a 6.5-20 Mildot, it was good cheap fun and comparable to 308 and a rifle that I was not attached to if I had a rough hunt.