I know they make a big difference, I have shot my guns with it and without it and POI definitely changes.
Upvote 0
Yes i've also seen this."EXZIVER"Gentelmen ,
Take this for what it's worth.. Bubble levels are not created equal. Especially the little bubble levels you get like with pictures hangers and such. Don't just assume that the bubble in the center of the lines is true level because the casing can be off a bit. A quick test is to check it by switching it 180 degrees and seeing where the bubble lands. I've had levels land center one way then spin it 180 and on the line the other way. Use the same exact surface and location when doing this. You may be surprised....
T.J.