Thread: Options to Fix Accuracy, Lack Off

Righto wise men. The rifle I had threaded to suppress has come back, and is lucky to hit paper now. It used to run sweet on PMC, but I can no longer source it. The last 4 shots through it were spot on. Since the I've tried another brand and it's spraying them all over, as in up to 12 inches off target. Ives got another couple of different brands to try, and will get into it soon to see what it does.
Next problem is the scope. It's a fairly high end Tasco Worldclass 3-9x40. Looking at going into somewhere that gets wet and don't want any fogging up. Looking at it closely there's smudges on the inside of the lens, so going to do something with it. While I'd like something that's bullet proof, and crystal clear, budget won't stretch that far. A VX1 is about it. That would double the value of rifle.
Just want a second opinion as whether I'm going down the right track.It is more coincidence that it's lost it's accuracy(change of ammo) than the work done on it .All screws and mounts are tight. I don't, and won't be reloading, so stuck with factory ammo. Each time I've gone and tried to sight in, I've been pressed for time so that's not helping either.
I can't be bothered chasing the problem to much more so are in 2 minds whether to quit it and get new one or not. By getting a scope and trying that, I won't be losing anything as it would go onto the new gun.
The barrels been given a good clean now, so that should rule out fouling