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Recoil testing of large caliber muzzle breaks
I am a gunsmith and among other things design, build and install muzzle breaks on large caliber rifles. I have designed a test sled to measure the differences in recoil with and without these breaks.
I would like some feedback on the design and ways to improve its' ability to measure recoil. I have attached three CAD sketches to illustrate.
[IMG]http://www.engineersedge.com/engineering-forum/attachment.php?attachmentid=1280&stc=1[/IMG][IMG]http://www.engineersedge.com/engineering-forum/attachment.php?attachmentid=1281&stc=1[/IMG][IMG]http://www.engineersedge.com/engineering-forum/attachment.php?attachmentid=1282&stc=1[/IMG]The recoil assembly is made up of a cut down barrel from a Remington 11 shotgun, the magazine tube from the same gun, and the recoil spring. these are captured in the lower assembly. The upper assembly consists of frame made from preformed channel (the same for the lower assy) and the sides made from butcher block type nylon. This slides on the black Delrin rails.
The sled, under recoil, pushes the upper against the spring and the distance is measured by the upper assembly pushing a sliding rod (not pictured) that is attached to the lower. A tattle tail device if you will. The deviation of a three shot string is about .02". A 7mm Remington Magnum recoiled 2" with no break and .96".
I would like some thoughts of how to get better consistency sot to shot.
Would leveling the center line of the bore with the sled help?
Thank you for allowing me to participate in this site.