This is basically the same rifle you're shooting right now. I shot this at 50 yards. The circled hits were some gold dots I was shooting. The lower group is 250 gr Sabertooth Conicals. I was using 90 gr of Kik 3f black powder. I was shooting off a single bag rest.

I use the target on top of the ball hold with this rifle. And as you can see, the hits are right where the ball is and a little left. But I was real pleased with the rifle and the Saber tooth.

I also tried to shake a Sabertooth off the load. I believe Frontier Gander had problems with them in this respect. I was not only not able to shake the conical out of the plastic wad, but could not move it off the load either. You can load these with out a short starter IF YOU SWAB BETWEEN SHOTS.

As for the design of these they are like a powerbelt with a closed nose of an XTP. They also come in different weights. The 300 grain shoot great out of my Knight Rifles so I am going to try them next time out in the GMB Renegade. Whether they would be legal in Idaho and how hard you could push them... might be something to consider.