This really is more of a gun question, but it concerns scope operation. I have an LMT MWS. The 16 inch barrel it came with was easy to zero. I have a Premier 3-15 in a Larue mount that I have shot on other ARs so I plopped it on and I was on a 8x11 sheet target- easy to zero in. I bought a 18inch SS barrel and its POI was about 2.5 feet to the left and up. I got it zero'd in at 100 but haven't shot it farther than that.
I've seated and unseated the barrel a few times because I thought maybe it was seated wrong, and the POI changes with-in 1 MOA- that is a tight lock-up system!
I know that the barrel and upper reciever are never perfectly aligned, but at what point does the barrel and the top rail being in different directions affect scopes ability to compensate? It seems to me the up and down is not much of an issue- but I'm picturing the barrel pointed straight ahead and the scopes axis is pointed to the right- am I going to have to make windage adjustments at longer ranges to compensate. How true to each other does the rail and barrel have to be?
I've seated and unseated the barrel a few times because I thought maybe it was seated wrong, and the POI changes with-in 1 MOA- that is a tight lock-up system!
I know that the barrel and upper reciever are never perfectly aligned, but at what point does the barrel and the top rail being in different directions affect scopes ability to compensate? It seems to me the up and down is not much of an issue- but I'm picturing the barrel pointed straight ahead and the scopes axis is pointed to the right- am I going to have to make windage adjustments at longer ranges to compensate. How true to each other does the rail and barrel have to be?
