Consider the twist in mounts a terrible way to mount a scope. When you adjust rear windage you put torque on the scope tube that soon or later is relieved resulting in point of impact movement. If you are able to mount stress free they work but if there is any stress on the tube it can eventually be relieved by hot cold or jarring. They have been used widely for years . If you adjust rear windage there is no good way to determine if stress exist in the tube. I have mounted scope this way ,sighted in, thentapped the front ring with a hard plastic hammer and saw point of impact move. Love them if you like but expecting the scope tube to turn the front ring when rear windage scew is adjusted is a bad idea.
Sometimes the rifles so mounted are the ones that need resighted often. A good scope mounted correctly in a good bedded rifle should not need resighted unless ammunition is changed.I have rifles with other mount systems that have not needed resighting in 25 years. Good shooting.
Last edited by foogle; 09/25/22. Reason: Spelling
