American Rifle Company Scope Rings For Ruger RPR Height:X-High-1.42"/36mm It has been our experience

It has been our experience that domestically produced cartridge cases run to the smaller side of SAAMI specification and European manufactured brass leans towards the bigger end

This video shows segments of the thread milling operation:

RPR barrel orders are NON REFUNDABLE

the problem is with your barrel

American Rifle Company Scope Rings For Ruger RPR Height:X-High-1.42"/36mm It has been our experienceProudly made in the USA, American Rifle Companys M10 Rings represent a new standard against which other rings will be measured. Even under the heaviest recoil, M10 Rings hold firmly without marring or indenting the scope. These uniquely split rings maintain reticle alignment during scope installation while their low profile leaves the shooter with a clear view of the turrets. M10 Rings feature a crowned rail interface which precisely and correctly