The bullet might be part of the problem; however, the biggest part is the Triple Seven which is so bad making the crud ring in my Omega I finally quit trying to use the stuff. I switched to Black Mag'3 and all the crud ring and difficulty loading multiple shots without a swab between went away. Goex Pinnacle and American Pioneer are other synthetics that give similar low fouling results. These last two ascorbic acid based powders are very coarse and you should buy the fffg version not the ffg. Black Mag'3 only comes fffg and is perfect the way it is in my rifle. With the Triple Seven it is important to use fffg if possible and low power primers like the new Remington Kleenbore.