WheelerEngineering Level, Mounting Leveling Tool with Magnetic Base and Adaptable Design for Scope Mounting, Gunsmithing, and Maintenance, Color may vary

The very same day I received these tools, I walked straight into the bedroom and went to work. I began leveling my work rifle’s scope, then putting the proper torque on the scope ring screws. I then took that same armalite rifle and began to shoot: 3 shot, 1-inch groups at 100 meters with cheap ammunition.Never been able to do that. This wrench HELPS.Outstanding, no telling what this rifle will do with expensive ammunition now.

Wheeler scope mounting level, worked perfect mounting and lining up my scope on an AR15 rifle

This is really a pretty simple product that's pretty simple to use. Find a level place to reference from on the receiver, preferably across the bore or as close to it as you can get.. find a level reference on the scope most likely the top turret.. apply some common sense, make the gun level and then match the scope to it.In my mind rating this product just boils down to accuracy and build quality. I saw several reviews claim their copy was not accurate and the two didn't get common readings. I took a new quality (not cheap) 24-in carpenters level layed it across my dining room table and shimmed one end with a few pieces of paper for a perfect level reading. Then sitting both the wheeler scope levels on top of the Carpenters level they all three got the same perfect reading. So for me there's no complaints with accuracy, they appear to work as they should with no issue that I can see.Build quality to me doesn't seem to be the best or what you might expect from Wheeler. Lightweight molded plastic frame and plastic bubble vials. I think it'll will do what I need to do if taken care of and put away and kept protected with my other gun tools. Nothing really wrong with them they just seem closer to $6 or $8 than the $13 to $14 I paid.I've seen buckets of tiny level keychains at box store checkouts for a couple of dollars and they seem very similar but they are accurate.I'll agree with another reviewer that the most accurate approach is probably to level the gun and then set up a weighted plumb bob a few yards away to align your vertical crosshair with. That's the way I've always done it and probably always will since it's always worked well. Plan to just use these wheeler levels to level the gun because I'm tired of balancing 9-in torpedo levels and taking up valuable storage space in my gun toolbox. Ultimately you're trying to level the crosshairs and this way you're working with the crosshairs which is way more important than the body of the scope.I'd say if you use them all the time maybe look for something a little nicer and if you're a weekend hobby shooter like me they'll do the job and there's no point spending a lot more money.. I've got many other wheeler products that have served me just fine.

Makes scope mounting much more precise

The receiver magnetic part attaches nicely to the CZ 457 11mm flat dovetail even with low rings. I had to take the cap off my Hawke frontier scope as it was rounded. Inside it was flat to accept the other level. Leveling the scope was super easy and fast. My levels read the same when placed on a flat surface. I had previously spent a fair amount of time leveling my scope. This product showed me that my reticle was canted.

This is a nice pair of spirit vials mounted on cheap nylon bases with embedded magnets. The extended magnetic base was level and true, but the turret level was off about a quarter of a bubble. You can check yours by putting it on a flat surface that's close to level, and spinning it 180 degrees in the exact same spot. It should read exactly the same regardless of the direction it's pointing.Both of the bases showed some rough (100 grit or so) sanding marks from the factory. I spent about 20 minutes with piece of 800 grit sandpaper truing up the turret base, and another 5 smoothing out the extended action base. Expect to do the same for yours, and make sure to sand them on a piece of glass or other truly flat surface.They worked great on a Tikka t3x, but the action base doesn't fit in the action of a Weatherby Vanguard. If I were buying this again, I would get one of the barrel clamp types instead and just level scopes in two steps. It takes an extra 2 minutes, but will work on any firearm instead of one that happens to have a perfectly flat and horizontal action. It would also sit fine on a picatinny rail or scope bases if you used really tall rings. The action base is .388 inches thick on mine.

Your scope crosshairs need to be level relative to the rifles bore to achieve true accuracy, anything less and you'll be chasing bullet holes due to canting.One magnetic level on the barrel and one on the Elevation cap when aligned and matched properly before the scope rings are tightened to specs will eliminate most if not all of ones headaches when it comes to properly mounting a scope.