So I'm almost out of N565 and have a solid load worked up with Berger 215's but I havent been able to find any to replace it. I happen to find the N565 by chance and bought a couple pounds to try, since Retumbo is impossible to get. Now I cant find N565 but was able to score 8lbs of N570. I thinking the charge weight should work out to about the same maybe slightly higher with the 570, but does anyone have experience with both powders in this cartridge? Of course I will start lower and work up, just looking to see what i could expect.