Re: 204question
I have the same rifle. Mine loves the 40 Vmax with a 5 thou jam, pushed by 26.8gr of H335. Runs about 3575 fps.
You can go hotter, but my accuracy node was there.
Shoots .15" 5 shots at 100y, longest I stretched it was 600y, circle around the 5 shots was 3.75"