IVEY SHOOTING, ELR

The adjustable scope mount is used to augment or replace the gross adjustment needed in long range shooting. In setting up your rifle for a 100 or 200 yard zero: Sight in your scope turrets at 100yards with the Ivey Adjustable Scope Mount at zero. After that use the Ivey Mount to adjust to the nearest whole number setting (example: your ballistic software recommends 20.7 Mil elevation at 2000yards, adjust the scope mount to 20.5 Mils and use your reticle or turret to adjust to +0.2 mil as necessary.)

In general, there is only user preference as the amount of total adjustment is virtually the same as 60 mils and 200 MOA are close. We recommend using the same units as your scope; if your scope is in MILS then it is highly recommended to use a MIL scope mount.

We suggest using a high quality Mil Spec 1913 Rail with 10mm spacing, 5mm lug clearance and preferably steel with at least 140mm or 5.5" of length. Even most short action rifles have this length of rail.

It is fine to use a canted rail although pending how much adjustment your scope has you may or may not be able to zero your scope at close range. Typically most ELR scopes have enough adjustment to get a 100 yard zero with a 20MOA base, however a 40 MOA may be past or near the limit for close range zeroing.

The simple answer is that it is not necessary. Our mounts are machined in a single process, stress relieved in the roughing process and finish on all critical surfaces in one single setup for a highly precise bore diameter and straightness of bore to the lower ring surfaces (<.002" TIR). Also, lapping the rings will remove the protective coating that is of greater benefit in keeping a scope from creeping under heavy recoil than the raw lap polished bore.

Follow the user's instructions, use the specified torques recommended and do not over tighten cap screws and clamp nuts. Insure you leave a little space on the bearing diameter of your scope near the bell, turret area, and rear power adjustment (so avoid jamming against the scope features). Feel free to email, text, or call us for any advice! We will try to answer any questions even on the weekends when you and I both are on the range.....

We recommend only using Medium Blue Loctite on everything but the clamp nuts and the ring cap screws. If anything, use a light grease or anti-seize lubricant on those. Any other fasteners that get loose, use Medium blue as that is what is used in our assembly process.

The Tension Lock Unit applies heavy die spring force (~50 lbs) to the spindle and cam track upwards at an angle to remove all backlash in elevation and windage and is active in absorbing recoil and protecting the internals of a scope from movement or damage. The correct operation of the lock can be checked by fully tightening the lock to its final "Clicked down" position and pushing down with heavy hand pressure on the rear ring and quickly releasing which should snap back to its original position. With this design, each shot gets the same locking force to maintain consistent return to the exact original setting.

"Why this unique design feature of the Ivey adjustable scope mount has been used the last 15 years on our mounts is that it has been proven to achieve the best repeatability and accuracy with heavy recoiling rifles, test stands, and recoil sleds over the last 25 years so important versus a manually tightened or screw tightened hard lock?"

We have found that the performance and consistency of a hard lockdown has many unpredictable drawbacks from (1) manually hand tightening/retightening of the hard locks induces variation of tension which changes point of aim each change or attempt to repeat to a dial setting, (2) Vibration each shot causes the lock position to creep unnoticeably until mysteriously an elevation dope needs 1 to 3 more MOA at the same distance with no other changes, (3) vibration will completely loosen from vibration and (4) over time heavy recoil can shear and wear down bolts causing thread failure in base material from having no place to mitigate recoil.

There are always a great selection of variables that we, as precision long range shooters, monitor and attempt to control. Aside from ammunition and the many reloading variables, one the most common and important variations are issues with a rifle itself: Loose muzzle brake, Stock or Action screws loose or creeping, scope rail screws loosening, optics adjustments moving, and the many Adjustable scope mount screws, locks, and dials. No system is flawless, however, periodic checks of your equipment and attention to detail will provide the precision shooter with reliability and confidence for any of our gear.

If a random flyer is seen when shooting every 1-5 shots, all the above rifle variables plus the Ivey Adjustable Scope mount should be checked (Tension lock is applied fully, all setscrews are tightened, bubble level is used every shot, and operation checked per instruction manual). If there is an issue with the Ivey Mount, you will not be able to shoot even 2-5 shots consistently.

If a random shot is one out of 20 shots or 50 shots, in 99.9% of all of our testing, the Ivey Adjustable Scope Mount is performing consistently and is very rarely found to cause that small level of random flyer, we always tend to find the real culprit to be another variable. If you suspect issues, please contact us and if necessary, you can send in your mount (free of charge) and we will bench test and recoil test your mount to check performance. We do not mind assisting you in any way to get your scope mount functioning to its best as it happens very rarely and takes us only 5-10 minutes to perform on our heavy test stand.

It is fine to use an easier to see bubble level on the scope or rail, however, the adjustable scope mount level must match as it will impart a large windage error if not......