I shoot sling in the spring and fall,and F open in the heat
Sounds like what I'm doing. I shot FTR a little a few years ago but then went back to sling. This summer I decided I didn't want to wear a coat in the heat, so I stuck a bipod on my 6BR prone gun (it still has a handstop on the rail) and started shooting F-Open. I'm having a ball with it. It may become my summer sport.
Dave Rabin