I just received my Notos a couple of days ago and initially had problems with my scope being wildly off, and since I found this thread while searching Google I figured I’d add my own follow-up to this discussion.
My setup: Sig Sauer Buckmaster 3-9x50mm (primary) with Monstrum offset high-rise picatinny rings, and a Monstrum Blackbird 1.5x Prism (canted) on a Weaver 45* picatinny offset mount. Using Crosman HP 14.8 grain pellets for initial testing/plinking.
The Monstrum Blackbird is mounted to the rear sight mount behind the breach on the Notos, and the Sig is fully mounted to the polymer rail, then offset rearward with the Monstrum rings.
Initial sighting at 20 yards on the Sig was 8” low and 12” right?! Twisting the windage turret several clicks to the left seemed to do nothing on the next shot. Thinking something was seriously awry I went back to square one, tore it all down, swapped scope rings front to back, squared everything up and tried again. 8” low and 10” right this time. Ugh.
So I tried the hand mirror trick in front of the Sig scope to check optical centering, and holy Moses was it off. Significantly to the right, as you might have guessed.
It took 1-1/2 turns of the windage turret to bring the reticle back to center, and about 1/4 turn to bring the elevation up.
Took it out and fired another couple shots, 2” low and 4” to the right. Much better. A few more twists and turns and I was hitting my 2” splatterburst target consistently, even though I only had a blanket and a footstool as a “bench,” while squatting. Definitely not the most stable platform for sighting.
Now I have to build a thicker backstop, lol. I put a piece of 3/8” plywood in front of our log pile to attach my target to, and the Notos was blowing pellets straight through it like it was paper.
So, to make a short story long, make sure to check everything. I figured that a Sig scope would be optically centered from the factory, and didn’t even think to check that at first. The sinking feeling that I was going to have to start filling out RMAs could have been avoided, and I would have slept a lot better that night, lol.
This is a fun little airgun, and I can’t wait to get it all dialed in.
Quick addendum: this photo was taken right after I first installed the scope, and the rings are in a slightly different position now. The front one has been moved back since it was too far forward.
Also, this thing is quiet. My framing nailer is louder than this airgun. The pellet hitting the plywood was the loudest part.