Tired of paying Bertrum Brass prices? No lathe on hand?, too lazy to hand trim .32-20 brass rims down?
7.62 Nagant Pistol brass trimmed back works in all my .310 rifles very well. Trim the brass to the length as there are two lengths you need for your bullet type being used..
Privi makes the brass and you can find it on sale for far less than .310 or .32-20 brass.
No base bulge when fired,extracts like butter, and I've reloaded cases ten times so far ( annealed after five sizings
Give them it a try.