.243 and I havent tried it without the forearm.I shot it yesterday.It may not be as bad as I think.After I got it on the paper @ 100yds,If I really relaxed and made sure I squeezed and not jerked,I actually had a couple shots touching each other then I would get the flyer,seemed to be low/right everytime.May have been hot and the trigger was whooping me to combine for some eradict shooting.I have honed the trigger somewhat,but not too much,since my 9yr old is going to use it,too light may be worse than a little stiff for her.Anyway,I can feel the forearm is bound up when I put it on,even without the screw in it,I can open/close the barrel and it stays on.