I load for a few different 30-30, including a couple of Marlin 336s, and just neck size the cases. Each rifle has its own set of cases, so there is little chance of putting cartridges that were previously fired in and reloaded for rifle "A" in rifle "B". So far, I haven't had any feeding, firing, or ejection problems in bolt, lever, or pump action rifles. My 30-30 recipe includes Winchester/Olin cases, Remington 170 grain RNCL bullets, and H4895. I used to use IMR-3031, but decided to change to H4895 'cause I can use it in other cartridges.
