Posted by david - OR on November 26, 2010 at 14:39:39 from (76.115.36.214):
In Reply to: o/t sighting in a rifle posted by johndeereman on November 26, 2010 at 14:19:16:
A slight grade will not matter.
3 inches low at 40 yards is not acceptable. Depending on the height of your scope the 40 yard point of impact should be between 0.5 inch low and 1 inch high to be zero at 100 yards and 200 yards respectively. Given a normal scope height of 1.5 inches and your report of 3 inches low at 40 yards this says your rifle barrel is aimed below horizontal. We'd expect it to be 6 or 7 inches low at 100 yards unless you adjust the scope.
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