However, some scopes just won’t hold zero, and some bases and rings just won’t hold tight. Not just for a while, but as hundreds, even thousands of shots create mini earthquakes. Good bases and rings do hold quality scopes precisely in place. 458 Lott can break a cheap or improperly mounted one with just a few rounds. 223 Remington, and 6.5 Creedmoor will never stress a scope. It’s surprising that anything could hold a glass telescope with many moving parts in place while a controlled explosion and a whole bunch of Newton’s Law occurs inside the rifle that scope is mounted to. When you think about it, riflescopes and the rings that hold them in place are rather amazing creations. Once that screw was tightened, the rifle produced its customary small groups, and the scope held zero perfectly. No wonder my point of impact had been way to one side. One of the side-mounted screws that clamps the rear ring in place had come loose. Lastly, I went to the scope bases-and found the problem. I checked that the scope ring screws were as well. I confirmed that the action bolts were torqued properly. Check them frequently to ensure they stay tight.įinally, a full box of ammo into the ordeal, I put on my forensics cap and began examining the rifle. A common cause of ring and base failure is loose screws. It was a Zeiss a premium optic that should be consistent and reliable. Worse, it wouldn’t shoot small groups, and I couldn’t get the scope to adjust properly and hold zero. To my frustration, I found the rifle hit way off. I’d flown to Tucson with the rifle, and wanted to be sure I was prepared to make a clean, precise shot on a tiny-bodied coues deer buck. Once, on the way into remote desert mountains in southern Arizona, I paused to check the zero of my lightweight custom mountain rifle.
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