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I find that my .310 is much happier when I crimp the load, as was the original. The tiny heel on the bullet gives poor neck tension without a crimp, resulting in variable velocities. The crimp also...

A case separation in the middle of a comp could spoil your day, so careful case inspection is well worthwhile. Check before you clean the brass - you are looking for any sign of a bright line around...

The 310 Cadet's rim is very thin, so an unmodified 32-20 or 32 SWL shouldn't chamber. If the action will close on one, the rifle is probably out of headspace.
The 32 SWL bullets are undersize for...

The original load would have had the case mouth crimped into the bullet's heel to increase the tension and hence improve consistency.
I found that I could dramatically improve the longer range (300...