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Re: Reliability of .50-70 models

Posted by D Miller on Thursday, 13 July 2017, at 8:20 p.m., in response to Re: Reliability of .50-70 models, posted by David on Thursday, 13 July 2017, at 3:51 p.m.

In hind sight I did not like my experiments results because I used a cartridge with a .523" diameter mouth. I made another cartridge out of bar stock that measured .535" in diameter that more closely represents a loaded round. Again disregarding throat erosion. I rechecked the same 10 pieces. 4 trapdoors, 1 Sharps and 5 Remingtons. The trapdoors ranged from 1.895" to 2.045. The Sharps 1.874". The Remingtons 1.837" to 1.898". Of the 10 chambers their length varied 0.208". The shortest was the M71 NY carbine and the longest was the M66 trapdoor. These numbers make a lot more since.

Trapdoors: M66 2.045", M68 1.895", M70 1.915", M70 carbine 1.900"

Sharps: M70 trial 1.874"

Remingtons: M70 trial 1.850", M70 Navy type 1 1.837", M70 Navy type 2 1.863", M71 1.898", M71 NY carbine 1.866


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