I used a late model M15 (1938) for many years for quail, grouse, doves, ducks, even a few geese. 1 1/8 oz 3 dram loads are heavy loads for these 7,0 lb guns. You and the gun will be much happier with 1,0 oz loads at about 1200 fps.
If the chambers, forcing cones, bores and chokes are original, it will be a very reliable field gun with 24 to 30 grams shot at 1200 fps, out to 35-40 yards. I used loads under 10.000 psi in mine, with a Damascus barrels I would stay below 8.000 psi, probably even less.
For last few years I have used only 7/8 oz (24 grams) of shot for everything in tight choked old Husqvarnas. Chamber pressures are below about 8.000 psi for these loads.
Niklas
Niklas
