I've got a .338 rum with a 27" kreigger, and a long Wyatt mag box. Most of my shots will be within 500 yards and none further than 750. I've settled on the 225 nab and I'll also mess with some 250 gr stuff. I've got some h-1000 on hand, retumbo, imr 7828ssc, re 22&25 and lastly some nv 560. I don't really want to waste my barrel trying stuff that doesn't work. I do my load dev. In so ca, so it's warm. But all my hunting is wyoming and ak. So I need a powder that's not real sensitive to temp changes. I've heard that re 22&25 are bad for that. How is 7828, and nv560? I'm looking for top accuracy, but I'd like it to be fast. Thanks for the help. Aaron
I am using Retumbo in mine, although that probably isn't of much help. I'm shooting the 300SMK, H-1000 has a strong following with the RUM & Edge cartridges & seems to be a good fit. Hodgdon Extreme powders have a great reputation for not being temp sensative, the RL's (22 & 25) are fairly sensative, although your loads from Cali will probably work here in WY, as they are worked up in warm/hot weather & shot here in WY where it is usually cooler, the pressure swing should be in a downward fasion. You may have to chrono in both places but that is a small matter, if it shoots the way you think it should, stick with it.
Thanks for the input guys . As the re22&25 is concerned, I'm more worried that I'll work up the load in ca, then find it's lost 150fps in wyo. That will throw my dope way off. Plus wyo has a way of being 80 one day and snowing the next! I really don't want to have to carry a crono.