I use 312-185 in my m39 and 12-13 gr unique for 100yd load. Good consistency and no need to tip up barrel for position. No signs of powder or pressure issues. I use PC on my 312 sized boolits with GC Ill try to grab a photo for you. Have to load them pretty far back as I have a essentially unissued m39 that had the tag still on it from the factory and no throat erosion. slugs at .3115 I use essentially the same load in my P14 as well with pretty good results. It has an original barrel and a ph5b on it so I am pretty confident in aiming consistency.