Re: My RUM Finally Roars
Good thing I talked to you Boyd. I would have started at 85 grains of Retumbo. With RL25 I went up to 88 for pressure then shot 87 (3020 fps) grains for groups. (My overall length averages about 3.74.) I got just a little bit of a sticky bolt at 88.5 grains of RL 25 in my rifle, so I backed off to 87 for a couple of groups using the same cases. I only got 3 loadings at that charge from a case though. I went to the slower powders looking for more velocity at that point. I ended up with about the same velocity with 96.5 grains of Ramshot Grizz (101 with Moly), but with less pressure. I have been loading hot gauging my Max working pressure on weather I can get 4 reloads out of a case or not. I had an extreme spread of 27 with the RL 25, which is another reason that I went away from it. It sounds like you have been having good luck with the Retumbo though so maybe I will be as lucky in my rifle. It does sound like I may end up with a little more powder for the same velocity though. I just realized I may have been having a real brain fart for part of this post. I was using Moly bullets. You did not mention any moly.
PS-anyone reading the loads I have posted I would highly recommend that you reduce by at least 10% to start a work up. I would also recommend taking into account the temperature at your location, and the fact that I was using moly bullets. I load hot for single pressure loads and then drop down for groups. I have never lost a primer or had a case failure, but that does not mean that you would be so lucky with these loads.
Working to improve hit probability.