A couple of weeks ago I purchased a set of 30mm burris signature rings to mount a new scope on a Sportco Omark 44 in 308 cal.
I chose these rings because I liked the concept of the plastic inserts to align, protect and adjust the scope. IT SOUNDED REAL GOOD.
So off to the range I go. First shot was about 8" low. No problems; armed with the latest and greatest of scope mounting systems with offset inserts and all, I set about the SIMPLE task of adjusting the scope. Over two hours later and having re-mounted the scope five times whilst questioning my intelligence, I decided to leave. Everything seemed to work in reverse to logic and I could not improve on the first attempt. 8" at 50m is a lot and using the scope adjustments to correct 16 moa of misalignment isnt a good idea.
The next day at home I tried with a bore sighter and when things started going astray again I got a set of calippers and started checking the insert.
This is what I found.
3 rings marked at zero measuring .100" +-.001"
1 ring marked + 10 measuring .110"
2 rings marked + 10 measuring .090" +- .001"
2 rings marked - 10 measuring .090" +- .001"
Thanks Burris! Great Idea but a little QA would help.
Took the rings back and refused an exchange.
I purchased a set of Leupolds qds instead. The perfect rings, they are split below the centreline so that the opening on the top ring is smaller than the diameter. Especilly designed to scratch your new scope on the first installation., But Thats another story )
I suggest that if you buy Burris rings you measure the insert before you pay.
I chose these rings because I liked the concept of the plastic inserts to align, protect and adjust the scope. IT SOUNDED REAL GOOD.
So off to the range I go. First shot was about 8" low. No problems; armed with the latest and greatest of scope mounting systems with offset inserts and all, I set about the SIMPLE task of adjusting the scope. Over two hours later and having re-mounted the scope five times whilst questioning my intelligence, I decided to leave. Everything seemed to work in reverse to logic and I could not improve on the first attempt. 8" at 50m is a lot and using the scope adjustments to correct 16 moa of misalignment isnt a good idea.
The next day at home I tried with a bore sighter and when things started going astray again I got a set of calippers and started checking the insert.
This is what I found.
3 rings marked at zero measuring .100" +-.001"
1 ring marked + 10 measuring .110"
2 rings marked + 10 measuring .090" +- .001"
2 rings marked - 10 measuring .090" +- .001"
Thanks Burris! Great Idea but a little QA would help.
Took the rings back and refused an exchange.
I purchased a set of Leupolds qds instead. The perfect rings, they are split below the centreline so that the opening on the top ring is smaller than the diameter. Especilly designed to scratch your new scope on the first installation., But Thats another story )
I suggest that if you buy Burris rings you measure the insert before you pay.