gotcha...our F-class matches are 3x20 at 600 and 1000yds meaning you shoot 3 strings of 20 rounds per string and have 20mins to shoot each string. you get unlimited sighters on your first string and then only 2 sighters for each of your last two strings.

if you can go and watch a match and see how its ran and start practicing like they shoot because shooting a 3 or 5 shot group at 500,600 or even a 1000yds is one thing and shooting 20 rounds at those distances is a entirely different ball game...the X ring for 600yds is 6" and the X ring for 1000yds is 10" so the X ring is 1 MOA...they sound big until your looking through your scope.

the reason I'm telling you this is because if you want to be competitive in F-class you need a load that will shoot consistently smaller than 6" and or 10" 20 shot groups at 600 and or 1000yds.