remington wrote on Apr 26^th, 2012 at 7:01pm:

Some posts back, parashooter recommended I try a .311 diameter lead bullt.

Here's what I actually posted, ". . . size your bullet to fit the throat, not the grooves. That will probably be more like .311" but a chamber cast or throat slug will let you know precisely what you're dealing with." That's not a recommendation to try .311" bullets. It is a suggestion that you learn more about your rifle before proceeding.

Bullets sized smaller than the throat can yaw off-axis because they're not supported during the critical time when entering the barrel proper. The hotter you load them, the more likely to yaw.

Maybe I should repeat the rest of my post, too. "Slow down a bit! 16 or 17 grains of 4759 will get that bullet to 100 yards just fine and will be less inclined to deform in the throat or engrave off-axis, especially considering that you're using a soft alloy more suited to .45-70 than .30-40."