I decided to use these bullets this year. I shot my bull at 162 yards, see post in elk hunting tread of quality mudflow bull. Anyhow I know there has been a lot about good bullets etc. on here. I wanted to give my experience from this season. I still use the Barnes 290 grain bullets and use the other Hornady 300 red saboted bullets for follow up loads.
As for these bullets they say they weigh 340 grains. They do load easy as stated. and they seemed very accurate to me while shooting them during practice. So, I shot my bull at 162 yards. he turned and laid down and before I was finished getting capped, he was sliding down the hill. Upon getting to him and gutting and skinning I recovered the bullet. and that petal was in the top of the heart. This bull looked like I shot him with a 300 win mag. I have not in my experience seen that kind of trauma with a muzzleloader in the few bulls I have shot with my muzz. 3 so far. All I can say is I was very impressed with the bullet performance. The recovered bullet and petal was 239.5 grains. so, it lost 100 grains, but went through both lungs and part of the heart and was on the offside under the hide. I will try to post more pics