Anyone use these for grabbing back some mechanical elevation potential? Looks like I can get up to 40MOA depending on how I use them......wouldn't bother with getting a new rail if these are working just as well for folks.
Burris XTR Signature ring inserts
- Thread starter atepointer
- Start date
I have a pair set to give me ~22moa in addition to the 20 from my rail (20moa inserts and a slight adjustment to ring spacing). That gets me just over a mile of dialing with 6.5CM American Gunner and an Athlon Cronus BTR scope.
I am using them on my 300 win mag, added 10 moa to a 20 moa base. Got enough elevation left to get me to 1925. Seem pretty solid too, haven’t had any scope slippage from what I can tell. Kinda a pain in the ass to setup or maybe it’s just me.
That's where my head is as well. With American Gunner looks like I'll need 25.81 mils for 1760. Burris XTR II I get 13.3mils mechanical elevation + ~ 5.9mils more from 20moa base....so I'll need to make up about 6.6 mils more with the inserts or 22moa.
At least I think I have that right I know you guys will correct me if I'm wrong. XTR 5-25 says 90 moa which works out to 26.6mils....half that is elevation right so I get 13.3-ish? Then 20moa base gets me ~ 5.9mils more.....then gotta grab some more with the inserts? I'm not adverse to doing hold overs I've done that for years with BDC reticles and hunting, but figure if I can take care of all my elevation mechanically why not?
At least I think I have that right I know you guys will correct me if I'm wrong. XTR 5-25 says 90 moa which works out to 26.6mils....half that is elevation right so I get 13.3-ish? Then 20moa base gets me ~ 5.9mils more.....then gotta grab some more with the inserts? I'm not adverse to doing hold overs I've done that for years with BDC reticles and hunting, but figure if I can take care of all my elevation mechanically why not?
The amount of total elevation you can dial is the lesser of:
The other option, which you can actually do, is take all of the ring inserts and your scope to the range, and give yourself 0.5mrad above zero, by replacing the inserts and adjusting ring spacing until you’re zeroed at that elevation.
Your image quality will be substantially degraded, and your erector springs won’t be happy, but that’s technically a thing you could do.
Alternatives:
- The number of possible turret rotations times the elevation per rotation (i.e. 2-turn turrets at 10mrad per rotation)
- Total scope elevation, divided by 2, plus rail inclination, plus ring/mount inclination, plus or minus about 10moa (tolerance stackup)
The other option, which you can actually do, is take all of the ring inserts and your scope to the range, and give yourself 0.5mrad above zero, by replacing the inserts and adjusting ring spacing until you’re zeroed at that elevation.
Your image quality will be substantially degraded, and your erector springs won’t be happy, but that’s technically a thing you could do.
Alternatives:
- Get a scope with more elevation adjustment.
- Get a Charlie TARAC.
- Get the ERA-TAC adjustable-inclination scope mount.
Ok thank you that is great stuff.....appreciate you taking the time to dumb it down for me I need it!
I run the xtr rings on a few guns. The biggest is the 375 snipetac. I have The atacr adjusted so I’m 10.5 moa high at 100 with all my elevation bottomed out. The image is noticeably not as good as when it’s in the center of travel, but I don’t shoot bottomed out much. Even with the recoil of that one, the scope has never slipped in the rings
Thanks man good stuff. In the end it's not the end of the world if I have to do some hold overs, but I will probably use shims in addition to 20MOA base and will just play with it a bit. The 2,000 yard range doesn't even open til August-ish and we can only shoot to 550 til then. Plenty of time to sort, but really appreciate the heads up here on + and -.
