Bought a newly made 1A in 7X57 a couple of years ago. It shot just great right out of the box. I mean really great, like 4 shot groups well under an inch as you can see below.
Since it wasn't broken I obviously had to fix that ASAP! Took the forend off and it had been hand fitted at the tip where it touched the barrel - at least that's what it looked like. There were obvious small spots where a leetle wood had been shaved off, right through the finish.
Put the forend back on, thought I put the screw in with the same tension but it NEVER again shot quite as good as it did straight out of the box.
Gunnery, gunnery, gunnery. Hit the target, all else is twaddle!