Well I was shooting my Knight Disc today and having the same luck. I would shoot five shot groups. Three or four would be right in the bull or in a real tight group, and then I would throw one. I was blaming myself. Twice when I got a flyer I knew it was me. One though really threw me for a loop. That with with a Shockwave. After I shot I kept checking the bull becuse I was certain I had not mess up. I found the hit about six inches high at 12:00 o'clock.

Your also right about the cost of shooting. When I used to shoot only roundball that I casted, it seemed like shooting was next to nothing. Now I get all these different sabots, conicals, projectiles, rifles, and manI got figuring it up one night and about fainted...

Hope all works out for you and your rifle..