222 rem mag ackley improved data


Sep 18, 2011
Warwick, NY & NYC
Does anyone with experience reloading this round, have data to load 50 & 55’s for the 14” Contender? (I do have Mike Bellm’s Data, but that is for heavier heads. Rifle data will be fine, if that’s available.
This case volume is larger than the 223RemAI, so any suggestions on how to modify that data for the larger case, would be appreciated. Thanks.
The rule of thumb for ALL Ackley rounds is to use MAX loads for the PARENT case as starting loads and work up until sticky bolt lift and back off 1% of that load.
This is how I’ve always done it, even with the 375 Weatherby.

Warning! This thread is more than 6 years ago old.
It's likely that no further discussion is required, in which case we recommend starting a new thread. If however you feel your response is required you can still do so.