I posted a while back about buying a Browning A-bolt. While I was developing loads I was consistantly grouping just over half an inch at 100 with 52 grain sierra match kings. when I got the load right i was getting 5 shot groups at 3/8th of an inch. then I decided I would fill the but of the synthetic stock up with metal ment (similar to devcon liquid steel) to make the rifle more evenly weighted and to reduce recoil so i can maintain a sight picture through recoil. then when I shot it it was grouping over an inch so i removed all the metal mend but things havent got much better. The best group i can manage is 3/4 of an inch at best. can anyone give me any sugestions as to what went wrong in doing this and what i might be able to do to fix it.