Just mounted brand new Arken SH4J on my FX M3. Went to the range to sight in and had to make 8 minute windage correction just to get on target at 50 yards. Can my M3 rail be that far off?
FX M3 scope rsil
- Thread starter gbmarcht
- Start date
That sound like a lot.
I suppose you have shot it before with another scope ? and it worked better.
So i am more inclined to think maybe new rings or something with the new scope, you could try and swap those around to see if you then need to adjust to the other side to get on the ball.
I suppose you have shot it before with another scope ? and it worked better.
So i am more inclined to think maybe new rings or something with the new scope, you could try and swap those around to see if you then need to adjust to the other side to get on the ball.
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Thanks, new Arken rings as well. Going to try a from scratch re-mount. Had a 4-16 on prior and no problems
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The gun may be out of alignment. Try loosening the screws in the action/barrel to relieve any tension, then carefully tighten them starting with the middle ones working out toward the butt and breech. Use a torque wrench.
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The stock M3 Impact rail has lots of slop in the mounting screws. This was one of the things FX "corrected" on the new M4. Its going to be kind of a pain in the neck, but I would re-center my scope and adjust the rail to correct as much windage as possible. One of the many headscratchers I found myself surprised to find on such an expensive premier product. The aftermarket rails like the Huma or the Airmaks Backbone are a much better design as another option.
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I don't know the M3 I have MK2 only.
The scope picatinny rail is a separate piece from action block and it is adjustable. Yes, that rail can be far off.
I enlarged the screw counterbore holes for that same reason to allow more offset.
The best how to tune that rail?
Set the scope to a mechanical center and mount it on the rail.
Take a larger sheet of cardboard and draw a vertical line, mount it to a backstop making sure the vertical line is in plumb line.
Shoot that vertical line from 5 yard and 30 or 50 y walking there and back and adjust the rail .... until both the near and far distance shots hits the same line.... or the holes are a same distance to the line.
And only now you can go an zero your scope windage.
The scope picatinny rail is a separate piece from action block and it is adjustable. Yes, that rail can be far off.
I enlarged the screw counterbore holes for that same reason to allow more offset.
The best how to tune that rail?
Set the scope to a mechanical center and mount it on the rail.
Take a larger sheet of cardboard and draw a vertical line, mount it to a backstop making sure the vertical line is in plumb line.
Shoot that vertical line from 5 yard and 30 or 50 y walking there and back and adjust the rail .... until both the near and far distance shots hits the same line.... or the holes are a same distance to the line.
And only now you can go an zero your scope windage.
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Thanks all, turns out my rear scope ring was not fully engaged with the pic rail. Fixed that and no more excessive windage adjustments.
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