Siringo wrote:Mine too! I just picked up some 325 gr 45-70 FXT's and am going to resize them to .452 and give them a push.
Me Too. I picked up a couple hundred, but I won't be able to start on them for a couple of months. That second crimp grove, on that bullet, was in part, put in for us 450b drivers to side crimp into. If we get good results they may make us a dedicated heavy weight. This bullet was made for the hot loaded 45-70 and dangerous game, like Moose and the big Bears, as opposed to a muzzle loader bullet, so if we can get it going, and I believe with guys like Siringo, this will be like falling off a log, the biggies will respond. So there ya go, you are now the Official Field Testers, of course all good factory things came from our crowd and always have and the eyes of our industry are on this site already.
With the heavier bullets, they may require slower powder, I plan to start out with 296 and then try AA1680. 1680 was absolutely the powder of choice for the 45 Pro, if high end performance was the goal, but not now. When I go from 296 to 1680, in the 450b, the speeds fall off at least 300fps. I had hoped that the increased bullet pull from the side crimp would have done the trick for 1680, but it didn't. With this heavier bullet, 1680 might make sense, time will tell.