Your rifle is plenty accurate enough to get into F Class shooting. Put a bi-pod on your rifle, zero it at 100 yards, go up 16.5 MOA (sixty-six 1/4 minute clicks) on your scope (175 gr Sierra), put together or buy 66 rounds of ammo and come to Palo Alto on the 1st Saturday of any month (January 2011 will be the 2nd Saturday because of New Year's Day). You will not win but you will be on target and have a lot of fun.
You could also buy or load some .223 match ammo and rent an AR-15 from the LSA for $5 (must be a member) and come shoot a highpower match. It will teach you a lot more about shooting than F Class.
You could also buy or load some .223 match ammo and rent an AR-15 from the LSA for $5 (must be a member) and come shoot a highpower match. It will teach you a lot more about shooting than F Class.