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Old June 9th, 2019, 10:09 AM #11
Pinecone Pinecone is offline
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Quote:
Originally Posted by 1time View Post
Still wonít line up. The front ring needs to be lower, not just shimmed. All shimming is is tilting the rings forward. The back of the hole in the ring will be higher than the front. With shims, the back of the front ring will be higher than the front of the back ring.

OP, you have a nice set up. Donít get cheap now. Iím sure egw or the like has a canted base. You are asking for problems shimming them.
The rear shim would need to be thicker. DUH.

Shimming with flat stock RAISES the ring. Shimming with angled stock, raises and tilts the ring.
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Old June 9th, 2019, 12:52 PM #12
atblis atblis is offline
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Why are you needing 25 MOA?
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Old June 9th, 2019, 01:29 PM #13
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Quote:
Originally Posted by Pinecone View Post
If you just shim one ring, with a flat shim, the inner ring surfaces with not be parallel.

You need to shim both front and rear with properly tapered shims.
Do you think lapping could solve this or would it be too much difference?
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Old June 9th, 2019, 02:10 PM #14
atblis atblis is offline
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A quick cad drawing and some guesses about ring spacing and size (1" rings, 0.5" wide, 3" spacing center to center), I get that you'd need to shim the rear base up ~0.022", and lapping would need to remove ~0.004" of material. Lapping might be an option because to me that doesn't sound like that much. Another (and possibly better) option is reaming. 1" spiral hand reamer works on horizontal split rings.

http://pacifictoolandgauge.com/scope...amer&results=6

ETA: Again, I'll pose the question as to what it is you're trying to accomplish. These look like hunting rifles from the pictures. What scopes are you running because some scopes have a very limited amount of adjustment.
For example:
1" tube Zeiss Conquests had like 60 MOA of elevation giving you like 30 MOA to work with assuming starting centered
Viper 6.5-20x50 PA-Dead-Hold BDC (MOA) Dimensions (in inches) has 65 MOA of elevation, so ~33 MOA usable
Leupold VX-3i 4.5-14x40mm (30mm) Side Focus CDS Options has 113 MOA, so 56.5 MOA usable.
Sightron SIIISS624X50LRWDP Has 100 MOA, so 50 MOA usable
Super Sniper 3-15x42 Tactical Rifle Scope has 140 MOA, so 70 MOA usable
Depending on what your current scope is, a different scope could easily buy you that 25 MOA you're after.
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Old June 9th, 2019, 07:48 PM #15
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My main objective is to shoot my Sako Finnfire 22lr out to 300 yards so I will need 15 Mils of elevation or about 50 MOA.
My scope is a Athlon Ares BTR.
https://athlonoptics.com/product/rif...btr-4-5-27x50/
Just want to practice shooting long range. I have a 6.5 Creedmoor, 6.5 Grendel and 6.5 Swiss and only shoot them once or twice a year since there is no ranges close by.Shooting 200 yards with a Creedmoor gets boring pretty quick.
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Old June 10th, 2019, 10:48 PM #16
Park ranger Park ranger is offline
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I'd be most concerned with damaging the scope. You are basically putting a bend in the scope.
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Old June 12th, 2019, 12:36 AM #17
atblis atblis is offline
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You could try the trick of putting a piece of lead shot under the set screw

Last edited by atblis; June 12th, 2019 at 07:40 AM.
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Old June 12th, 2019, 07:14 AM #18
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I had a similar problem, both Evolution Gun Works and Vortex told me to shim. EGW also told me this is a known problem with the Vortex Viper PST 6-24 x 50.


I also got crap from people here for even wanting the capability to adjust properly over 800 yds ... which in my mind is similar to asking why a 30 rnd mag, semi-antis?
Good Luck OP, call some companies ... they love to help.




7mm Rem Mag in my case.
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Last edited by ironpony; June 12th, 2019 at 07:16 AM. Reason: added.
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Old June 12th, 2019, 07:54 AM #19
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Quote:
Originally Posted by atblis View Post
You could try the trick of putting a piece of lead shot under the set screw


This is what I would do. Use the DIP base. You out a piece of lead shot in the hole so it doesnít scratch you receiver. It is a very common solution for CZís.

I maintain that shimming 2 piece bases with separate rings will cause more problems than it will solve. If you are great with math and have really good machine skills it could be done. Both shims would have to be at the same angle and the rear shim would have to be the perfect thickness to align with the angle created by the shim.

On my 22 I use a 20 moa base and adjustable rings. I can adjust from 10 yards to just short of 400 yards. I have plenty of reticle for an accurate dial +hold for 400 yards.
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Old June 12th, 2019, 09:16 PM #20
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Quote:
Originally Posted by atblis View Post
You could try the trick of putting a piece of lead shot under the set screw
That is a good idea. I have a couple bags of shot laying around. Going to order the 25MOA DIP rail tonight.
Thank you.
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