After a poor shot at a roe buck on Monday night (see: http://www.thestalkingdirectory.co.u...pic.php?t=5331 ) I went down the range last night and the rifle was shooting about 1.5" low & 1" right at 100 yards. I was still getting decent groups, but this is the 3rd time I zeroed in as many months and I'm starting to lose confidence in the setup.
It's a relatively new rifle (sako 75, 100ish rounds through it) and the only thing I'd done since last time I zeroed is removed and refit the mod a few times. Same batch of Norma ammo.
I'm a bit lost as I seem to get consistently tight groups but have to keep re-zeroing. Last time I zeroed was pretty much the exact opposite of what I found last night - 1.5" high & 1" left, rather than 1.5" low & 1" right. I'm starting wonder if the (secondhand) S&B scope is at fault or question the quality of the barrel threading job???
At the weekend I intend to strip the scope mounts and bases, check for tightness, locktite and refit everything. I'll give the action screws a check and confirm the barrel is still floating freely (synthetic stock) then whiz the mod on and off a few times and see if that makes any difference.
Is there anything else I should be checking/looking for? I'm at the edge of my limited rifle experience and running out of options!!