My brother in law bought one of these used at a pawn shop. We went out to the range to see how it shoots and we were rather confused. When fired into paper at about 20 feet, there was a perfect imprint of the bullet, but it was sideways. Almost like it tumbled when it came out of the barrel. We were using Winchester 115 gr. hollowpoints, and also tried 124 gr. FMJs. Same thing with both bullets. Can anyone explain what is going on?? I have never seen this before or even heard of it.