offset scope

[rifleman14]

my mosin nagant has a scope mount that is offset to the left by an inch or 2 which is a lot. i needed to put a thick towel on the stock to level my eye to the scope. Anyway...if i zero the mosin for 50 yards will the shot hit farther to the left or right as i move to greater distances? think of it as x being the barrel and y being the scope line. y has to line up with x for windage to be right on. so if x and y arent completely in line to start with then wont they get even farther apart after they intersect at 50 yards? this in theory would make the shot move farther left or right im not sure which

 

[kirklandkie]

the bullets will hit left

-kirk

 

[rifleman14]

how far? 1 inch at 100 yards and 10 at 1000? ooorrr what

 

[Red Tornado]

Depends on how you zero it. If your scope is offset, say an inch to the left, then if you zero at 50 yds, it will be an inch off to the right at 100 yards. Zeroing at 100 yards and you'll be off an inch to the right at 200 yards, but only off 1/2" to the left at 50 yards. Those are probably both less than the group size you can achieve with a Mosin.

An alternative method is to zero your scope an inch to the left and adjust your hold by an inch. Then it will be parallel with the flight of the bullet to infinity. Depends on how far you'll be shooting and personal preference. My K31 is zeroed at 100 yards and that's well within point blank for any reasonable distance for me, either target shooting or hunting.
RT

 

[kirklandkie]

50 yards = 1800 inches
sohcahtoa
to find the angle of offset of our scope we do:
tan(x)= 1800/2
thus: x = tan^-1(900) = 89.936338 degrees is our angle that our bullet goes relative to the weapon
from that you could figure out respectively where it'll land on paper, but the real way is going to be in the real world. take it out and have some fun with paper targets

-kirk
p.s. if you really want i can derive an equation but it seems futile considering the nature of theoretical physics which deny the existence of a lot of real world factors.

 

[Red Tornado]

Just realized I was backwards on which side the bullet would land on. It was late and I didn't think it through.

I can't argue the physics, I don't even remember trig. But unless it's one of the most accurate Mosin's ever, the variance of the group size is going to be larger than the offset from aiming, right?
RT

 

[Dr. Tad Hussein Winslow]

Anyway...if i zero the mosin for 50 yards will the shot hit farther to the left or right as i move to greater distances?

The answer is simple and unequivocal: The further past 50 you go in that scenario, the further to the right the POI will be.

 

[Wolfhvnter]

I know thatseveral Eastern Bloc rifles have the scope offset to the left and quite high, because you're actually supposed to use your left eye for sighting. Sounds absurd, I know, but I've read that the Russians designed their weapons this way. And in practice, it seems true as well, every PSL I've handled or shot was sighted like this.

This seems to be this issue here as well.