RE: Conicals And Fast Twist Barrels
if I remember correctly you havea Genesis? You will probably only get fair results out of it shooting conicals. They are like the TC's in that they have the QLA and some of them don't like conicals. Mine I can get decent results out it. Good enough to hunt with out to 100 for sure, but nothing like the way it shoots sabots. I can get most sabots to shoot around an inch at 100. The best conical I could get was a .504 460 Bullshop at that was about 4 inches. You may fair better than I did, but so far that's the only thing I have found I don't like about my Genesis.
It may shoot Powerbelts though. I never tried as I'm not fond of the bullet. If you do decide to give them a try ask Frontier Gander about how he suggest you shoot them. He's done a lot of testing w/them.
Good luck and let us know how it turns out.