desporterizer, I'm willing to bet that rifle will shoot well under an inch with decent bullets and handloads. I have a couple of 1908s that have identical chambers. They both shoot under an inch with these loads, the first comes from Lyman #46 manual and gives 2900fps at 43,000psi.
W760 - 49.0grns
CCI BR 2 primers
OAL - 3.010 in with a nut gauge
either 139grn Hornady #2825 BTSP or 140grn Sierra #1905 bullets
50grn - H414SL10
CCI 250 magnum primers
There is absolutely no change in point of impact with idendical sight settings between the two loads. I use this same load in a Peruvian M95 and a Spanish 93 as well as a 1935 brazilian and a Winchester Model 70 with pretty much identical results.
I don't usually give out loads without seeing the rifle it's intended for, but with the moderate pressures in this one and it's phenomenal consistancy, I don't have much problem. All of these rifles, other than the sporter, have 29 inch bbles, with excellent bores, so expect slightly lower velocities from shorter bbls or worn bbls. bearhunter