I have a 220 swift AI and have shot 55gr v-max with satisfactory results. I decided to try the 52 a-max. I went out the first day and loaded them with the same load I use with the 55's (45gr. RL15 @ 4250fps) They shot bad, and I don't mean 1.5" groups compared to .5". I mean an 8" group. Now I was thinking something had to be wrong, like my scope is loose or something. I went home and inspected all parts of the rifle. Eveything checked out fine. Day two. Thought that maybe it was a fluke so I loaded some more this time just a tad hotter, they were around 4330fps. Shot my group, same result. I was prepared this time and brought some of the ole trusties along, shot them into a nice little hole. So what do you think is happening with these bullets?