I have not found to much loading data so far. I know some are loading the 270 grain spire point. Right off hand I don't know what the capacity in grains that the 444 case will hold. I do know that in the handgun, the recoil is healthy. The carbine makes for a very light to carry compact rifle. I have the 45-70 barrel (23"). On it now. Most reccomend trap door level loads in the G2. However a rep. at Nosler said they load it to Marlin levels. In a five and a half pound rifle, thats strong enough as are the trap door loads. Anyway I think its going to be a fun project during the off season. Thanks for the reply's.