Using H4895, I can put three 260 Nosler Accubonds into a 3/4" group from a take-down M1910 in 9,5x57 MS. They register 2257 ft/sec at 10 ft. They feed well and the mildly compressed load has a Standard Devation that hovers around 9-14. Recoil is keen with a steel butt-plate.

These Accubonds have a good BC at .473 which means that with a MV of 2250 they maintain 1800 ft/sec out to 275 yards. Nosler's 260 grain partitions, however, have a BC of .314 so at the same MV they only maintain 1800 ft/sec out to 175 yards. So the Accubonds reliably open about as far as I'd care to shoot this old timer with open sights.

The brass I use is Norma 9,3x57 which I run through the RCBS 9,5x57 F.L. dies. I have used R-P .30-06 brass.