I have a CVA/BPI Beartooth, and have found that the 270 gr Sabertooths fit quite loosely in a clean bore. The bullet itself engages the rifling just enough so I can't push them completely into the muzzle with my thumbs (I'm a weakling with low threshold of pain) . But after pushing them completely into the bore with the rod, they slide the rest of the way extremely easily - almost to make me wonder if they'll stay put on the charge. After pushing them completely through the barrel, the rifling leaves a clear, but slight mark on the copper jacket.
The weather's been too cold to shoot them yet, but that's what info I have so far.

jaybe