I've used both of them’…, my money is on the Sniper Tools version... When you set the rifle up for your scope to bore, leveling the scope reticle to the world and the ACD bubble level at the same time; set your Sniper Tool ACI Angle Cosine Indicator up at that time while the rifle barrel is level; based on the bore not the taper off the barrel…. The photos don’t saw the nylon .22 cal & .30 cal. dowel that goes into the barrel(s) to verify that the bore is level in this thread. This concept makes it a real pipe hitter at any angle.
Scope Alingment .223
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