I'd join over here and ask in the right subforum, these guys live and breath rimfires. Someone should be able to get you pointed in the right direction.
I've had questions on some of the 22 rifles and 17hmr I own that were all answered with good advice on what may cause your problem and how to fix it.
http://www.rimfirecentral.com/forums/index.php
Brownie
I've had questions on some of the 22 rifles and 17hmr I own that were all answered with good advice on what may cause your problem and how to fix it.
http://www.rimfirecentral.com/forums/index.php
Brownie