.22-250, not AI.3900 from what?????
Someone over on LRH claims he's getting 3900+ fps using RL17. I get 3675 with a fairly mild load of Benchmark; real accurate there so I have not tried anything else yet.
Haven't shot any critters with those bullets yet.
Edit to add: .22-250 w/26" barrels.
Thanks for the input, Benchracer. Not much reloading data out there on the 53 V-Max (I worked off that info on the Hodgdon 52 VM some, too.) Did try 414/760, also RL15, but didn't consider going to a slower-burning powder than those.
Now, it looks like groups open up if I try much more Benchmark. 3900 would be great. Might try some RL17.