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This review is from: Universal Laser Bore Sighter Boresighter .177 - .50 Caliber Rifle Rimfire (Misc.)
I tried to use this out the box and initially couldn't understand why the sights were so off. I then realised the shaft of the laser bore sighter isn't correctly aligned. So as you rotate it the laser describes a circle. It's now in a proper receptacle - the bin. I've gone back to looking down the bore at a target having secured the rifle in a fixed bench rest. Once the target has been so fixed I then adjust the scope. Absolutely foolproof & works every time. Yes, you need daylight but that's it. Perhaps my laser bore sighter was a badly made one but it was as useful as a ruler incorrectly marked out.