EXD ENGINEERING - VERTICAL RETICLE INSTRUMENT
DescriptionAccurate Check For Perfectly Aligned Scope Crosshairs
Adjustable, self-aligning V-blocks with integral spirit level makes zeroing your scope faster and far more accurate. Enhances final scope accuracy by squaring the crosshairs to the bore. Even a slight cant of the crosshairs can reduce overall accuracy, change point of impact and increase the likelihood of missed "bulls" or wounded game.
Big Book Catalog, Issue:72, Page:460
Discussed in Where to level?! in the Long Range Hunting Forums community
Yup. My bench end is against a wall. I have a level line on the wall. When I use this device, I move the butt end of the rifle close to the wall, turn off the lights and shine a bright flashlight through the objective lens of the scope. It puts a magnified image of the reticle on the wall. Move the image over the level ... ... more
I've encountered the same situation with a Wheeler leveler and kit. Something that I have been using with good results is the EXD Engineering Vertical Reticle Instrument that I got from Brownells. For me the tool does make sense, I use it with a Tipton vise and a vertical line that I drew with a level on the basement wall. ... ... more