Would you please have info when Ruger tightened tolerances of chambers on NMBH 45 Colt?
Can that be established by serial number?
I know that some years ago Ruger made NMBH in 45 Colt with quite large chambers. See extract from excellent article "The .45 Colt - Dissolving the Myth, Discovering the Potential by John Linebaugh" https://www.johnlinebaughcustomsixguns.com/writings :
They are an engineering marvel but why they won't tighten up their tolerances and chamber proper size charge holes in the cylinder is beyond me. Ruger .45 Colt chambers are BIG. I have seen and measured hundreds of them and they are .486 to .490 in dia.
(*UPDATE- This article was written 25 years ago and the new Ruger Bisleys and Blackhawks that we measure now in 45 Colt caliber have EXCELLENT minimum dimension chambers “but tight” chamber throats. Read .451, these should be opened up to .453 for best results. Ruger got part of it right. Tight chambers stopped the brass stretch. JL, Jan. 2017)
I am considering one NMBH 45 Colt, 7.5", but hesitate to jump before knowing more. Seller is a gun dealer, and from my experience, they do not bother to answer. Otherwise, I will ask shop to measure chambers.
Can that be established by serial number?
I know that some years ago Ruger made NMBH in 45 Colt with quite large chambers. See extract from excellent article "The .45 Colt - Dissolving the Myth, Discovering the Potential by John Linebaugh" https://www.johnlinebaughcustomsixguns.com/writings :
They are an engineering marvel but why they won't tighten up their tolerances and chamber proper size charge holes in the cylinder is beyond me. Ruger .45 Colt chambers are BIG. I have seen and measured hundreds of them and they are .486 to .490 in dia.
(*UPDATE- This article was written 25 years ago and the new Ruger Bisleys and Blackhawks that we measure now in 45 Colt caliber have EXCELLENT minimum dimension chambers “but tight” chamber throats. Read .451, these should be opened up to .453 for best results. Ruger got part of it right. Tight chambers stopped the brass stretch. JL, Jan. 2017)
I am considering one NMBH 45 Colt, 7.5", but hesitate to jump before knowing more. Seller is a gun dealer, and from my experience, they do not bother to answer. Otherwise, I will ask shop to measure chambers.