Burris XTR ring insert question

[Gargoyle]

So many wrong answers!. The -10 on the front tilts the scope down approx 10 mins. The +5 on the rear bottoms adds another approx 5 moa downward tilt. Front and back produce opposite effects. Replace the 5's with a set of 0's. That will reduce the tilt by approx 5 moa. About as close as you can get.

Frank

Not a hard fact. The distance between the rings makes a difference. There is a chart in the box that shows what the MOA change is per distance of rings. I think the best way to mount these rings is to bore sight them. Put 10% bottom travel on the elevation turret and then see what combo works to get the cross hairs bore sighted as best as possible.

 

[NDAR15MAN]

I was getting ready to post the same type of question. Then seen this post. Hope you guys help me. Just to make it simple I am shooting to high and need to bring my bullet hole lower. So the scope ring that is nearest to tip of the barrel
top half of that needs to be a + or - ?
Bottom half that same front scope ring needs to be a + or a - ?
Rear scope ring ( ring closest to the butt stock ) that scope ring top 1/2 of ring needs to be a + or a - ?
Bottom half of that same scope ring needs to be a + or a - ? I can decide what number to put in just need the right combination on each ring to bring bullet hole down. Thanks. Marty

 

[Straightshooter1]

I was getting ready to post the same type of question. Then seen this post. Hope you guys help me. Just to make it simple I am shooting to high and need to bring my bullet hole lower. So the scope ring that is nearest to tip of the barrel
top half of that needs to be a + or - ?
Bottom half that same front scope ring needs to be a + or a - ?
Rear scope ring ( ring closest to the butt stock ) that scope ring top 1/2 of ring needs to be a + or a - ?
Bottom half of that same scope ring needs to be a + or a - ? I can decide what number to put in just need the right combination on each ring to bring bullet hole down. Thanks. Marty

Which inserts to use depends a lot on what your scopes maximum elevation adjustment you have and you're rails cant (20 MOA, 30 MOA, 40 MOA???). So, you need to answer those two questions (regarding your rails and your scopes maximum elevation adjustment).

Which half you put on top doesn't effect the cant of the scope, but what you put on the bottom does. Be aware too that how far apart the rings are on your rail effects the amount of cant you'll have, though to a smaller degree depending on having different inserts on front to back.

 

[TIMO]

See attached, hope this will help in making your adjustments.
Tim

 

[NDAR15MAN]

I don’t know what to say….. I have a zero rail on gun. I am trying to bring bullet down , I know my spacing. So If it does not matter what I have on top then it should be even easier question to answer. I will call Burris in morning.
But thanks for trying. Marty

 

[6MMsteve]

I don’t know what to say….. I have a zero rail on gun. I am trying to bring bullet down , I know my spacing. So If it does not matter what I have on top then it should be even easier question to answer. I will call Burris in morning.
But thanks for trying. Marty

you always move the scope to the bullet impact area so if your high at impact then add to the front or remove from the rear, move CH to bullet hole, iron sights are opposite you move them away

 

[fkimble@charter.net]

Top and bottom numbers must be same, just one + and other -. Or another way is when added top and bottom must equal "0". Don't get too hung up on ring spacing unless it is very short or very long.

Frank

 

[boltfluter]

Top and bottom numbers must be same, just one + and other -. Or another way is when added top and bottom must equal "0". Don't get too hung up on ring spacing unless it is very short or very long.

Frank

Well said. This really is basic stuff. Here's a novel idea to get the gist of how the inserts work. Read the instructions from Burris, as they are very good. Not meant as demeaning, just what has worked for me. In this case, a picture is worth a thousand words. Good luck.

Paul

 

[Gargoyle]

Well said. This really is basic stuff. Here's a novel idea to get the gist of how the inserts work. Read the instructions from Burris, as they are very good. Not meant as demeaning, just what has worked for me. In this case, a picture is worth a thousand words. Good luck.

Paul

I did a few years ago. Understood them so well I realized their illustration was backwards in my pamphlet. I called Burris and they confirmed I was right and the illustration was a mistake. I'm sure they fixed it by now...

 

[NDAR15MAN]

Thats ok guys , Burris answered my question on what plastic insert goes on top and what plastic insert goes on bottom for my issue in 5 seconds. My advice wound Be to call Burris. So , so much easier. MD

 

[jghoghunter]

Wow I've been using these inserts for years. With the signature series and also the xtrs I never realized it was this hard. Just check the directions on the paperwork that came with them and you will be okay and you'll be able to figure it out.

 

[Gargoyle]

Wow I've been using these inserts for years. With the signature series and also the xtrs I never realized it was this hard. Just check the directions on the paperwork that came with them and you will be okay and you'll be able to figure it out.

You can lead a horse to water, but you can't make the daggum thing drink!

 

[Coyotefurharvester]

All insert use should come from the initial zero moa inserts and scope turrets at optical zero. Bullet impact high, raise front of scope drop rear. Bullet impact low, drop front of scope raise rear. Rings spacing greater than 3.5" less moa than insert value in actual scope movement, space rings closer than 3.5 increase moa of insert in scope movement.

 

[Gargoyle]

All insert use should come from the initial zero moa inserts and scope turrets at optical zero. Bullet impact high, raise front of scope drop rear. Bullet impact low, drop front of scope raise rear. Rings spacing greater than 3.5" less moa than insert value in actual scope movement, space rings closer than 3.5 increase moa of insert in scope movement.

Optical zero:
Hunting gun 100-500yds probably just leave it at optical zero. A BDC in the scope will account for all drops.

ELR gun: I have 1-2 mil under the zero and the rest of the internal elevation adjustment is left for 1000yds to 1 mile shots. I have only a mil left of "UP elevation" after the mile mark, so I am contemplating putting some more downward cant on the scope.

 

[BoydAllen]

The original Signature Z ring inserts were specified in thousandths and based on that I was able to do a simple ratio problem to come up with the effect at a given distance with a given spacing. For visualization, I suggest that people think of the rifle scope as mounted on a fixture where the scope is held so that its cross hairs are on target and depending on which way you want the bullet hole to go, you will be tilting the bore more up or down. When I was working with insert offsets in thousandths of an inch, for the math, I would convert the distance to target into inches. My standard method was to center the scope reticle on the OD of the main tube, by rotating the scope in a padded, home made V block fixture, rotating and adjusting until the cross hair intersection did not move on a target as the scope was rotated, then I would mount the scope with the zero insert rings, and shoot a couple of shots at a target at say 50 yards, and measure the horizontal and vertical distance (in inches) of the group or bullet hole from the point of aim. With that information and the center to center ring spacing, I was good to go for the math. The whole calculation took less time than writing this.

 

[6MMsteve]

The original Signature Z ring inserts were specified in thousandths and based on that I was able to do a simple ratio problem to come up with the effect at a given distance with a given spacing. For visualization, I suggest that people think of the rifle scope as mounted on a fixture where the scope is held so that its cross hairs are on target and depending on which way you want the bullet hole to go, you will be tilting the bore more up or down. When I was working with insert offsets in thousandths of an inch, for the math, I would convert the distance to target into inches. My standard method was to center the scope reticle on the OD of the main tube, by rotating the scope in a padded, home made V block fixture, rotating and adjusting until the cross hair intersection did not move on a target as the scope was rotated, then I would mount the scope with the zero insert rings, and shoot a couple of shots at a target at say 50 yards, and measure the horizontal and vertical distance (in inches) of the group or bullet hole from the point of aim. With that information and the center to center ring spacing, I was good to go for the math. The whole calculation took less time than writing this.

Good explanation

 

[Eric Leonard]

Switching the rear to zeros should give you 5 inches or so.