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Double Rifles, Single Shots & Combinations >> Double Rifles

Dutch44
.275 member

Reged: 23/02/06
Posts: 80
Loc: Missouri

Re: Alex Henry 450 3 1/4
01/05/09 11:26 PM

Slugged the bore last night with a v-anvil and pins. Seems the bore diameter is .460 and the grove is .466-467, measured 10 inches from the breach. The right chamber had a very small burr next to the extractor which looked like a minute shaving. However, you could see the mark it left on the brass case. One pass with an extremely fine file took care of that problem. We then shaved off the bottom of the sizing die, which, to my surprise, had been previously machined off. Well, this took care of the right chamber but the left was still a very minute tight. I'll take the sizing die back for one last pass and that should clean this problem up. Will still use dedicated brass for each rifle.

Now, it appears, I will have my friend construct me one of his adjustable paper patch bullet moulds in .457-8 bore diameter to patch at 465-6 groove. With black this should do well. I am loading a duplex load to shoot tomorrow with 10 grains of 4759 and 90 of black with those soft lead .458 slugs just to see what happens with the undersized bullets bumping up. The Summer 2007 DGJ has an excellent article on the "progressive cut" Henry rifling and the measurements on the specimen measured for the article (a Henry 450 3 1/4) was .471 for groove. You can definitely feel the choke in these barrels. That's why it was necessary to measure 10 inches from the breach to get an accurate idea of the bore.

I'll let you know how it shoots tomorrow.

Dutch

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Subject	Posted by	Posted on
Alex Henry 450 3 1/4	Dutch44	26/04/09 02:43 AM
Re: Alex Henry 450 3 1/4	Anonymous	26/04/09 03:31 AM
Re: Alex Henry 450 3 1/4	Dutch44	26/04/09 06:02 AM
Re: Alex Henry 450 3 1/4	Anonymous	26/04/09 06:30 AM
Re: Alex Henry 450 3 1/4	Arctic	26/04/09 07:23 AM
Re: Alex Henry 450 3 1/4	500Nitro	26/04/09 07:39 AM
Re: Alex Henry 450 3 1/4	470evans	26/04/09 10:53 AM
Re: Alex Henry 450 3 1/4	Paul	26/04/09 08:36 PM
Re: Alex Henry 450 3 1/4	500Nitro	27/04/09 02:05 AM
Re: Alex Henry 450 3 1/4	Paul	27/04/09 10:48 PM
Re: Alex Henry 450 3 1/4	Huvius	27/04/09 11:16 PM
Re: Alex Henry 450 3 1/4	Dutch44	27/04/09 11:39 PM
Re: Alex Henry 450 3 1/4	DarylS	28/04/09 02:41 AM
Re: Alex Henry 450 3 1/4	470evans	28/04/09 04:00 AM
Re: Alex Henry 450 3 1/4	Dutch44	01/05/09 11:26 PM
Re: Alex Henry 450 3 1/4	DarylS	02/05/09 12:03 AM
Re: Alex Henry 450 3 1/4	Dutch44	02/05/09 01:25 AM
Re: Alex Henry 450 3 1/4	Huvius	07/08/09 11:03 PM
Re: Alex Henry 450 3 1/4	eagle27	08/08/09 08:04 AM
Re: Alex Henry 450 3 1/4	tinker	08/08/09 10:17 AM
Re: Alex Henry 450 3 1/4	DarylS	09/08/09 01:36 AM
Re: Alex Henry 450 3 1/4	eagle27	09/08/09 07:53 AM
Re: Alex Henry 450 3 1/4	Dutch44	19/08/09 09:56 AM
Re: Alex Henry 450 3 1/4	500Nitro	26/04/09 02:53 AM

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