Just got first hand knowledge from the guy who did it, blew up a Ruger SRH .454 Casull. He's a great reminder to PAY ATTENTION when reloading. No names to protect the idio, uh, innocent. Anyway, he grabbed what he thought was a container of W-W 296, but grabbed W-W231. The old round containers look kind of similar. 29.5 grains and a trip to the range= no top strap and part of the cylinder gone. We all know how strong these guns are, so the pressure must have been one step beyond freaky. When the guy came in to pick up the NEW gun Ruger had replaced the other one with, I gently chastised him. Well, kind of gently. No physical damage done to him. Had an angel on his shoulder that day.