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Rifles, Reloading, Optics, Equipment
Long Range Scopes and Other Optics
Changing POI
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<blockquote data-quote="lisagrantb" data-source="post: 809401" data-attributes="member: 11072"><p>Last night I completely dismantled the gun, base and stock. I re bedded the base (didn't find anything wrong with the old bedding) and put just the barreled receiver in the vise. I took a dial indicator and mounted it to the barrel about 3 inches from the receiver and put the indicator on the rail. I could put pressure on the tang and the indicator would move .001" in each direction and always come back to zero, I would think this would be normal flex in a receiver especially one not in a stock for extra support. I then mounted the original scope and rings. I moved the indicator still mounted to the barrel to read on the front ring cap, I could see the +- .001 movement but this time it would not go completely back to zero. It wasn't much off only about .0002 (the best I could tell) I don't know if that is enough to worry about. I then moved the indicator to the top of the objective bell and repeated the test. This time I was getting a change in zero of about +- .001" that is a .002 error. I ran a quick calculation and that .002" on a 4" ring spacing would give me a little over 1MOA change. My next test will be changing out rings and scope to see what changes that makes.</p></blockquote><p></p>
[QUOTE="lisagrantb, post: 809401, member: 11072"] Last night I completely dismantled the gun, base and stock. I re bedded the base (didn't find anything wrong with the old bedding) and put just the barreled receiver in the vise. I took a dial indicator and mounted it to the barrel about 3 inches from the receiver and put the indicator on the rail. I could put pressure on the tang and the indicator would move .001" in each direction and always come back to zero, I would think this would be normal flex in a receiver especially one not in a stock for extra support. I then mounted the original scope and rings. I moved the indicator still mounted to the barrel to read on the front ring cap, I could see the +- .001 movement but this time it would not go completely back to zero. It wasn't much off only about .0002 (the best I could tell) I don't know if that is enough to worry about. I then moved the indicator to the top of the objective bell and repeated the test. This time I was getting a change in zero of about +- .001" that is a .002 error. I ran a quick calculation and that .002" on a 4" ring spacing would give me a little over 1MOA change. My next test will be changing out rings and scope to see what changes that makes. [/QUOTE]
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Rifles, Reloading, Optics, Equipment
Long Range Scopes and Other Optics
Changing POI
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