Actually it was a .368 cal rifle. From Doc's site......


"White had been participating in the National Muzzleloading Manufacturer's Match in Friendship, Indiana, put on by the National Muzzleloading Rifle Association since 2000. The original concept was to shoot commonly available muzzleloading target rifles in competition at paper and steel target from 25 to 150 yards. Tuning was allowed but only what an ordinary hunter might do to his hunting rifle. It soon became obvious that the various companies were doing far more than that, with special barrels, and bullets and the best of shooters. White tried competing with off the shelf rifles but their amatuer shooters usually lost badly to other more sophisticated teams. In 2007, I was approached by a group who saw the potential in the White System. As a consequence, we (the team and I) designed a .368 caliber rifle that I called the Varminter, designed for slow, meticulous shooting at small game or target. The team won that year, 2007, beating all old records for team and individual shooting by a substantial margin. Our best shooter only lost 9 points out of 300 for the match. The performance was so astounding that the match disappeared. Nobody wanted to come back to face that kind of competition. I was personally disappointed that the other companies did not rise to meet the competition."