New Posts New Posts RSS Feed - Need help with Burris Posi-Align inserts
  FAQ FAQ  Forum Search   Events   Register Register  Login Login

Check GunBroker.com for SWFA's No Reserve and No Minimum bid firearm auctions.

Need help with Burris Posi-Align inserts

 Post Reply Post Reply   Topic Search Topic Search  Topic Options Topic Options
Post Options Post Options   Thanks (0) Thanks(0)     Back to Top Direct Link To This Post Posted: February/06/2016 at 11:36
tpcollins View Drop Down
Optics Journeyman
Optics Journeyman


Joined: January/12/2009
Status: Offline
Points: 325
I'm trying to understand how to calculate the +/- .005" - +/- .020" inserts . The Burris site doesn't explain this very well, but Midway USA does. I read this to say that putting a set of the +/- .005" inserts in the front only would change the poi about 5" at 100 yards.  I've read that if you orient them correctly in both the front and rear, that you could use two sets to double that poi.< ="text/" ="safari-extension://com.ebay.safari.myebaymanager-QYHMMGCMJR/54adfb7//helpers/preHelper.js">

For example. if you set +/- .010" in the front and rear rings correctly, you would change the poi 20" at 100 yards. But wouldn't that depend on the spacing of the rings on the scope tube? If the rings are set closer together, wouldn't the poi should be greater than if they were spaced as far apart as possible.

Or is this just a ballpark and not an exact science? Thanks.
Post Options Post Options   Thanks (0) Thanks(0)     Back to Top Direct Link To This Post Posted: February/06/2016 at 12:24
Maverick2 View Drop Down
Optics Apprentice
Optics Apprentice
Avatar

Joined: December/30/2013
Location: N. Idaho
Status: Offline
Points: 137
Yes, ring spacing plays a big part.  Between selection of inserts and playing around with spacing between font and rear rings, you can get about any kind of ramp angle you want.  I put these on a scope with limited elevation adjustment on a 6.5 Creedmoor and used these to maximize my available adjustment.   I'll look for my notes relationship between spacing and ramp angle.
Post Options Post Options   Thanks (0) Thanks(0)     Back to Top Direct Link To This Post Posted: February/06/2016 at 12:37
Maverick2 View Drop Down
Optics Apprentice
Optics Apprentice
Avatar

Joined: December/30/2013
Location: N. Idaho
Status: Offline
Points: 137

Hmmm -- here's what I sent to a friend to help him set up a scope with these rings.   This may help.

"... The +/- 10 inserts in back only will give you a 10/1000 inch offset, and the +/- 10 inserts in front AND back will give you a 20/1000 inch offset.  If you mount the rings about 3.5" apart, the amount of total offset you have should be pretty close to the gain in MOA (ie., a 10/1000 inch total offset should be about a 10 MOA gain, and a 20/1000 inch offset should be about a 20 MOA gain...)  If you spread the rings further apart, you'll get less MOA gain per amount of total offset, and if you mount the rings closer, you'll get more MOA gain.  I like these rings.  I prefer to space my ring mounts as wide as I can on the scope, and playing around with +/- 10 inserts in front and back, was able to gain 15 MOA which was perfect to maximize available elevation adjustment for my scope..."

Post Options Post Options   Thanks (0) Thanks(0)     Back to Top Direct Link To This Post Posted: February/06/2016 at 13:36
tpcollins View Drop Down
Optics Journeyman
Optics Journeyman


Joined: January/12/2009
Status: Offline
Points: 325
Thanks Maverick - so would your 3.5" ring spacing be measured from the center of the ring's width to the center of the next ring's width? < ="text/" ="safari-extension://com.ebay.safari.myebaymanager-QYHMMGCMJR/54adfb7//helpers/preHelper.js">
Post Options Post Options   Thanks (0) Thanks(0)     Back to Top Direct Link To This Post Posted: February/06/2016 at 14:45
Gerry Atric View Drop Down
Optics Apprentice
Optics Apprentice
Avatar

Joined: April/21/2011
Location: Sweden
Status: Offline
Points: 197
In my book (learned on this forum) ring spacing should be measured from outside - outside of the rings.


Gerry Atric
Post Options Post Options   Thanks (0) Thanks(0)     Back to Top Direct Link To This Post Posted: February/06/2016 at 14:48
Maverick2 View Drop Down
Optics Apprentice
Optics Apprentice
Avatar

Joined: December/30/2013
Location: N. Idaho
Status: Offline
Points: 137

Originally posted by tpcollins tpcollins wrote:

Thanks Maverick - so would your 3.5" ring spacing be measured from the center of the ring's width to the center of the next ring's width? < ="text/" ="safari-extension://com.ebay.safari.myebaymanager-QYHMMGCMJR/54adfb7//helpers/preHelper.js">


Yes, I believe that's how I measured/calculated it when figuring it out.

Post Options Post Options   Thanks (0) Thanks(0)     Back to Top Direct Link To This Post Posted: February/06/2016 at 23:47
Stevey Ducks View Drop Down
Optics Apprentice
Optics Apprentice
Avatar

Joined: December/03/2011
Status: Offline
Points: 266

Burris Posi-Align ring inserts are wonderful and make for terrific results.



Edited by Stevey Ducks - February/08/2016 at 00:20
Post Options Post Options   Thanks (0) Thanks(0)     Back to Top Direct Link To This Post Posted: February/07/2016 at 01:16
Maverick2 View Drop Down
Optics Apprentice
Optics Apprentice
Avatar

Joined: December/30/2013
Location: N. Idaho
Status: Offline
Points: 137
Originally posted by Gerry Atric Gerry Atric wrote:

In my book (learned on this forum) ring spacing should be measured from outside - outside of the rings.


Gerry Atric

For these rings and what the OP is wanting to do, I believe he needs to deviate from the norm and measure center of ring to center of ring if he wants the math to tell him the right relationship between insert thickness and distance between rings to get a desired ramp angle w/o a bunch of trial and error.  (The way these rings and inserts are constructed, I believe the stated insert thickness is correct at the center of the ring, rather than the outside edges.)

Post Options Post Options   Thanks (0) Thanks(0)     Back to Top Direct Link To This Post Posted: February/07/2016 at 02:13
Gerry Atric View Drop Down
Optics Apprentice
Optics Apprentice
Avatar

Joined: April/21/2011
Location: Sweden
Status: Offline
Points: 197
Thanks Maverick,

As long as I´m learning something new this old geezer is still alive Wink



Gerry Atrick
Post Options Post Options   Thanks (0) Thanks(0)     Back to Top Direct Link To This Post Posted: February/07/2016 at 13:38
tpcollins View Drop Down
Optics Journeyman
Optics Journeyman


Joined: January/12/2009
Status: Offline
Points: 325
Originally posted by Maverick2 Maverick2 wrote:

For these rings and what the OP is wanting to do, I believe he needs to deviate from the norm and measure center of ring to center of ring if he wants the math to tell him the right relationship between insert thickness and distance between rings to get a desired ramp angle w/o a bunch of trial and error.  (The way these rings and inserts are constructed, I believe the stated insert thickness is correct at the center of the ring, rather than the outside edges.)

 

That was my thinking as well Maverick, as these rings and inserts are hemispherical (I think that's the proper term) in design and would hinge in the middle of the ring - at least in my mind.




 < ="text/" ="safari-extension://com.ebay.safari.myebaymanager-QYHMMGCMJR/54adfb7//helpers/preHelper.js">




.
< ="text/" ="safari-extension://com.ebay.safari.myebaymanager-QYHMMGCMJR/54adfb7//helpers/preHelper.js">
 Post Reply Post Reply
  Share Topic   

Forum Jump Forum Permissions View Drop Down

Similar Threads: "Need help with Burris Posi-Align inserts"
Subject Author Forum Replies Last Post
Burris Posi-Align inserts Yotimbo Rifle Scopes 4
Burris - Posi lock needed for .41mag? argentine Handgun Scopes 2 5/9/2005 7:53:38 AM
Burris E1 vs Vortex Diamondback (NEED HELP!) xot3ric Rifle Scopes 11
Burris Signature Pos-Align Ringsand TU Bases?? Newaygo1 Rings and bases 0
Burris XTRII or Sightron SIII? Please help kickin45 Rifle Scopes 34
Burris Signature ring inserts shelby1941 Target 1 7/16/2004 7:26:12 PM
Burris Posalign Inserts zzzzzzzz Rings and bases 5
Seemingly Rare Binoculars: Need Help with ID! Nightsurf13 Binoculars 2
Need help identifying vintage scope 67goingthing Rifle Scopes 4
Trijicon 3-9x40 scope ID help needed waltham41 Rifle Scopes 10


This page was generated in 0.406 seconds.