"Acceptable" Scope Offset

Printable View

04-19-2018, 03:16 PM
Harpoon1

"Acceptable" Scope Offset

What is an acceptable difference in windage offset? I got 2 model 10's with after market bases installed, Seekins and Badger, where there is a considerable difference in offset to one side or the other. I've switched scopes, rings, turned the rings around, swapped bases back and forth between guns. And both guns still need to be cranked over considerably more to one side than the other. In opposite directions between guns though. Leaving me slightly less than 3 mils correction in one direction and 9+ mils in the other.

Don't expect it to be equal, but, 3 times as much difference to one side seems excessive. Especially when only being left with less than 3 mils correction.

After all the swapping, it would seem to me the screw holes for the bases are out of alignment. Or am I missing something?
04-19-2018, 06:53 PM
Robinhood

did you buy the rifles new?
04-19-2018, 09:50 PM
Stumpkiller

I wouldn't be happy with that - but I will say I have a S.M.L.E. Mk IV* with a "existing screw hole" scope mount (aka "non-gunsmith scope mount") that puts the scope centerline 1/2" to the left of the bore. So I sighted it 1/2" left at 100 yards and aim a "hair" to the right.
04-20-2018, 02:16 AM
Harpoon1

Quote:

Originally Posted by Robinhood

did you buy the rifles new?

Yes.

Both bases were also purchased "new".
04-20-2018, 08:53 AM
rosewood

Easy fix, swap to "standard" turn-in bases and rings. Easy to center. Or go with the Millett "angle loc" scope rings that allow for windage adjustment. I typically center my crosshair then do my bore sighting windage adjustment using the bases.

https://www.brownells.com/optics-mou...-prod9129.aspx

Rosewood
04-20-2018, 02:43 PM
Harpoon1

Quote:

Originally Posted by rosewood

Easy fix, swap to "standard" turn-in bases and rings. Easy to center. Or go with the Millett "angle loc" scope rings that allow for windage adjustment. I typically center my crosshair then do my bore sighting windage adjustment using the bases.

https://www.brownells.com/optics-mou...-prod9129.aspx

Rosewood

Want to keep using a 20-40 MOA base and need 34mm and/or 40mm rings.

Thanks for the heads up.
04-20-2018, 10:45 PM
BB68

I have 1 12fv and 1 axis with the same problem. I am going to use leupold mounts to correct the problem, even though they choke off the port.
04-20-2018, 10:50 PM
RustyShackle

I’ve read of some folks having issue with the Leupold mounts, however I haven’t. Maybe I’m lucky, the biggest complaint I can come up with is the partial blocking on the rear
04-21-2018, 08:59 PM
bearcatrp

Get these Burris XTR Signature rings. Has inserts to correct your problem. I use these on my savage 338 LM FCP. Work great.
https://www.burrisoptics.com/mountin...ignature-rings
04-22-2018, 01:23 PM
Willy

Quite disappointing that Savage still hasn't figured out how to drill and tap centered holes in the receiver. Most of my Savages have that problem and yet my WBY Vanguards and Tikka don't have those issues at all.
04-23-2018, 07:35 AM
rosewood

Quote:

Originally Posted by Harpoon1

Want to keep using a 20-40 MOA base and need 34mm and/or 40mm rings.

Thanks for the heads up.

I didn't realize you were using MOA bases. I don't think the turn-in are made with that ability (not sure it is geometrically possible). The ring inserts someone else mentioned sound like the answer you are looking for.

Rosewood
05-28-2018, 08:14 AM
GaCop

Quote:

Originally Posted by rosewood

Easy fix, swap to "standard" turn-in bases and rings. Easy to center. Or go with the Millett "angle loc" scope rings that allow for windage adjustment. I typically center my crosshair then do my bore sighting windage adjustment using the bases.

https://www.brownells.com/optics-mou...-prod9129.aspx

Rosewood

+1, windage adjustable rings will solve your problem.