Quote( Since I do a lot of hiking and hill climbing the Pa woods I mounted swivel studs but was afraid of cracking that slim fore end so mounted a fore end screw that doubles as a sling stud.... My old 99F had the stud mounted directly to the wood. I don't over torque this screw just keep it snug and it serves it's purpose well.)Quote
Are you sure the swivel screw stud is not changing the forearm tension? I had a newer 99 A in 250 Savage that Forearm screw stud messed with my zero and accuracy.
Test it without Forearm as was mentioned earlier!
Varying Forearm or FA pressure up or at the back will mess with zero and accuracy.
