I am new to the site and am hoping some of you can help me with my current issue. I have a win model 70 300 win mag with a vortex viper 6.5 to 20x50 mounted with a weaver extended 20 MOA rail and weaver grand slam rings. I am zeroed at 300 and I only have 20.5 MOA available which gets me out to 950 but not 1000. The rail is not backwards (it slopes toward the barrel) andI have verified the 20MOA rail measurements are correct and the ring heights match each other. The viper should have 65 MOA. This means I should have roughly half of that plus 20 minus 4 for the 300 yard zero. This puts me at roughly 48 and I have 20.5 on one rifle and 9.5 on the other????
I thought I would have more adjustment so I need ideas on how to get there???? I have to wonder if others owning the M70's have had similar problems. Seems odd that two rifles with the same setup have the same problem. I have emailed Burris about their signature rings to see if they will sell me the eccentrics for a 30mm tube to get an additional 20MOA but have not heard from them.
Also I have a 270 win with the exact same setup and I only have 9.5 MOA to work with which only takes me to 650. Bummed out is an understatement when the rifle will shoot .3 MOA groups.
I have been having a ball shooting the longer ranges but am stopped for now until I get past this.
I thought I would have more adjustment so I need ideas on how to get there???? I have to wonder if others owning the M70's have had similar problems. Seems odd that two rifles with the same setup have the same problem. I have emailed Burris about their signature rings to see if they will sell me the eccentrics for a 30mm tube to get an additional 20MOA but have not heard from them.
Also I have a 270 win with the exact same setup and I only have 9.5 MOA to work with which only takes me to 650. Bummed out is an understatement when the rifle will shoot .3 MOA groups.
I have been having a ball shooting the longer ranges but am stopped for now until I get past this.
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