I recently acquired a Swiss "stutzen" martini-actioned offhand target rifle chambered for the 7.5 swiss cartridge. this is a later rifle, probably a Hammerelli made barreled action with a 4 groove barrel for the later 1911 cartridge. it seems to have a 1-11 twist and the bore mikes to .296/.306 (b & g)
I am interesting in learning more about cast bullet loads, powders and moulds for this since I intend to use in as my centerfire offhand rifle in the ASSRA Schuetzen offhand matches next season. especially interested in proper moulds since the cartridge in the bolt rifles has some bullet design quirks from what I see elsewhere in these forums
Yesterday I fired some commercial Hornady 7.5 Swiss cartridges, jacketed of course, box rated at 2700 fps JHPBT bullets, and there were absolutely no pressure signs