The only reason I'm so discouraged with such a limited amount of testing is that I have useda number of other 300 grain .451 bullets (Shockwave, Barnes Expander, Speer Gold Dot) with the same charge and the same sabot - and gotten real good groups. I'm also a little stumped at why this bullet starts so hard. It's almost like there is a crud ring just inside the crown. I have shot this particular rifle more than any other I own - never has done this before with any other bullet. All fingers are pointing at the bullet here. And I'm wondering if it isn't the bevel base of the bullet. Or the overall softness of the lead. They shot great out of a .454 Casull. I tried to go back out the range this afternoon. It is mother of all mud bowls. I'm staying out of there for awhile - until it gets a lot warmer, or a lot colder