I will post some results as soon as I can get out and do some shooting. I am hoping to go out this weekend. The couple shots that I managed to shoot the other day in the howling wind, showed no signs of any blowback. When I took the gun apart to clean it, the reciever showed no fowling inside which might indicate blowback. I am going to shoot Hornady 300 grain XTP sabots, Dead Center 240 grain sabots, and 385 grain Hornady great plains bullets. All with a 100 grain charge of 777. I am already thinking about switching powders however, since I noticed quite a "ring" of residue that was pretty hard to remove. I will post results and some pics when I get done wringing this gun out.