How did you remove the FH? I only ask because I know they are on super tight and if not removed properly, you can do some damage to the receiver. OT: I'm in the same boat as far as groupings go. Off a rest w/open sights or a RDS, it's lucky to get a 4 inch spread. Now I understand the 15-22 is not supposed to be a tack driver, but this is kind of ridiculous. Especially when my $90 Marlin 60 will out shoot it all day long. I'm about to either send it in to S&W or sell it.