IMR 4064 works for me but I had some bad experiences with the 52 gr A-Maxes. Nice and accurate but didn't do well on a couple of coyotes I shot with them. One coyote was out a good distance but under 300 yards. The other was no more than 40 yards. The bullet has a thicker jacket than the V-Max and doesn't open as well. Both coyotes died but not until after a good run.