I did a complete reseal job even though I don't think it needed it because I could only get 460ish FPS out of it and I thought it should be 500 or better. After all was done it shot great (accuracy-wise) but velocity was still under 500 (475ish) with 12 pumps.
Then suddenly groups went to hell. I cleaned the barrel.....no help. Took 20 shots over a chrony and all were within 8 fps of each other. Switched pellets.....no help. Switched scopes.....same deal.
What the heck could be wrong NOW?
Oh yeah, checked all the screws...still tight.
WTF?
When I look down the barrel the rifling is barely noticeable. Has the barrel "shot out"? Is that even a possibility?
Then suddenly groups went to hell. I cleaned the barrel.....no help. Took 20 shots over a chrony and all were within 8 fps of each other. Switched pellets.....no help. Switched scopes.....same deal.
What the heck could be wrong NOW?
Oh yeah, checked all the screws...still tight.
WTF?
When I look down the barrel the rifling is barely noticeable. Has the barrel "shot out"? Is that even a possibility?