Took my SAS .30 cal can out today for the first time. It's a blast to shoot! Normal loads are nekkid ear safe for me and the subsonics are flat amazing! I had a question about the subsonic loads, thought. I loaded up some150gr PSP and 180gr RNSP bullets of 9.0 and 10.0gr of Trail Boss, respectively. Heeding teh warnigns I"d read, I fired a few rounds, without the can, at about ten feet and 25 yards. All holes looked good; perfectly round. When I moved to a hundred yards with the can on it, the 150's were hitting sideways on paper. I had one 150 go supersonic, so they must be right on the edge for the temp/elevation/etc. All of the 180's stayed subsonic and shot into about 2" groups at 100 yards. Rifle is a FNH PBR with a 1:12" barrel on it. I"m happy with the 180's for subsonic loads, just curious why the light weight bullets didn't stabilize when the heavier ones did. This seems backwards to me.
Thanks for any insight.