I know it sounds unbelievable. My smith even told me it would probably loose 80-100 fps. I'm really not seeing it though..
Not unbelievable...
24" is the way to go for a carry weight 7 RM. Not a bit surprised to see in excess of 3000 fps with the 160 from a 24" barrel,and RL25 is a good choice in a 7 RM with bullets 150 gr and over. For that application it has replaced RL22 for me.
BSA you are on the right track!