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Double Rifles, Single Shots & Combinations >> Double Rifles

buckstix
.400 member

Reged: 07/11/12
Posts: 1116
Loc: Whitetail Country

Re: Macnaughton 577-500 No.2 bpe Double Rifle
20/10/18 11:45 PM

Hello rigbymauser,

Thank for the reply.

As the picture shows in my opening post, I made a chamber cast which extends into the rifling. These barrels have 7-groove Henry-Style rifling which makes measuring across the lands difficult. Nearest can I measure is 0.507" groove dia.

Today I made a ball gauge to measure the bore diameter. It measured exactly 0.490" in both barrels. This would explain why the barrel flats are marked "40" and not "39". When gauging the bore a 39 gauge would not fit, but a 40 gauge would. (see chart)

--------------------
"You never pay too much for something, you only buy it too early."

Post Extras

Entire topic
Subject	Posted by	Posted on
Macnaughton 577-500 No.2 bpe Double Rifle	buckstix	19/10/18 12:28 PM
Re: Macnaughton 577-500 No.2 bpe Double Rifle	casper50	19/10/18 01:59 PM
Re: Macnaughton 577-500 No.2 bpe Double Rifle	buckstix	19/10/18 10:13 PM
Re: Macnaughton 577-500 No.2 bpe Double Rifle	Huvius	20/10/18 02:04 AM
Re: Macnaughton 577-500 No.2 bpe Double Rifle	93x64mm	20/10/18 07:22 AM
Re: Macnaughton 577-500 No.2 bpe Double Rifle	buckstix	20/10/18 11:41 AM
Re: Macnaughton 577-500 No.2 bpe Double Rifle	TH44	20/10/18 12:14 PM
Re: Macnaughton 577-500 No.2 bpe Double Rifle	rigbymauser	20/10/18 08:03 PM
Re: Macnaughton 577-500 No.2 bpe Double Rifle	buckstix	20/10/18 11:45 PM
Re: Macnaughton 577-500 No.2 bpe Double Rifle	Huvius	21/10/18 12:52 AM
Re: Macnaughton 577-500 No.2 bpe Double Rifle	Wayne59	21/10/18 01:17 AM
Re: Macnaughton 577-500 No.2 bpe Double Rifle	buckstix	21/10/18 10:26 AM
Re: Macnaughton 577-500 No.2 bpe Double Rifle	Wayne59	21/10/18 12:27 PM
Re: Macnaughton 577-500 No.2 bpe Double Rifle	DarylS	21/10/18 01:18 PM
Re: Macnaughton 577-500 No.2 bpe Double Rifle	buckstix	21/10/18 11:30 PM
Re: Macnaughton 577-500 No.2 bpe Double Rifle	DarylS	22/10/18 02:52 AM
Re: Macnaughton 577-500 No.2 bpe Double Rifle	buckstix	15/12/18 11:57 PM
Re: Macnaughton 577-500 No.2 bpe Double Rifle	93x64mm	22/10/18 08:00 AM
Re: Macnaughton 577-500 No.2 bpe Double Rifle	buckstix	22/10/18 11:28 PM
Re: Macnaughton 577-500 No.2 bpe Double Rifle	93x64mm	17/05/20 08:48 AM
Re: Macnaughton 577-500 No.2 bpe Double Rifle	TH44	20/10/18 10:11 AM

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