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Double Rifles, Single Shots & Combinations >> Building Double Rifles & Gunsmithing

Ron_Vella
.333 member

Reged: 29/04/05
Posts: 432
Loc: Oshawa, Ontario, Canada

Re: Double rifle project, calibre 9.3x74R
23/02/12 12:57 PM

Hopefully what I'm about to explain may be of value to a few other builders. A couple of weeks ago I was at the point where I was ready to solder these barrels into the mono-block. Before I did, I decided to put all of the components, including scope and rings, on an accurate scale, to determine aproximately what the finished rifle was going to weigh. I was astounded to find that it was going to be just a couple of ounces shy of 11 pounds, a fine weight for a .45 calibre dangerous game rifle, but far too heavy for a 9.3 x 74R. There are a number of areas where I'm going to shave some weight, but the most obvious was the barrels. When I set them up in my lathe, between centres, there was far too much chatter to get a good finish.

I took the barrels to a local precision grinding company and asked them to remove .025" from the radius for a total reduction in diameter of .050". They set the barrels between centres and ground .001" per pass under a heavy flow of coolant along the entire straight taper of the barrels. They were even able to blend the rear end of the grind very nicely into the radius at the front end of the breech reinforce. The total charge for this service was $80.00, which I think is extremely reasonable.

The best news is that this grind resulted in a weight reduction of 10 1/4 ounces for the two barrels. That's a big reduction in just one component. Something to bear in mind if you have a similar problem. And by the way, the resultant finish is like a mirror, and the finished diameter of the two muzzles doesn't differ by .0001"!

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Subject	Posted by	Posted on
Double rifle project, calibre 9.3x74R	Ron_Vella	04/07/11 12:15 PM
Re: Double rifle project, calibre 9.3x74R	CHAPUISARMES	04/07/11 12:29 PM
Re: Double rifle project, calibre 9.3x74R	AkMike	04/07/11 04:55 PM
Re: Double rifle project, calibre 9.3x74R	kamilaroi	04/07/11 06:22 PM
Re: Double rifle project, calibre 9.3x74R	DarylS	05/07/11 12:54 AM
Re: Double rifle project, calibre 9.3x74R	Ron_Vella	05/07/11 06:40 AM
Re: Double rifle project, calibre 9.3x74R	DarylS	08/07/11 01:59 AM
Re: Double rifle project, calibre 9.3x74R	bwanabobftw	08/07/11 03:47 AM
Re: Double rifle project, calibre 9.3x74R	Ron_Vella	31/01/12 01:49 PM
Re: Double rifle project, calibre 9.3x74R	Ron_Vella	31/01/12 02:09 PM
Re: Double rifle project, calibre 9.3x74R	AkMike	31/01/12 02:17 PM
Re: Double rifle project, calibre 9.3x74R	500Nitro	01/02/12 07:28 AM
Re: Double rifle project, calibre 9.3x74R	DarylS	02/02/12 01:35 AM
Re: Double rifle project, calibre 9.3x74R	Ron_Vella	02/02/12 08:43 AM
Re: Double rifle project, calibre 9.3x74R	Ron_Vella	02/02/12 01:32 PM
Re: Double rifle project, calibre 9.3x74R	DBLGN	10/02/12 04:29 AM
Re: Double rifle project, calibre 9.3x74R	Ron_Vella	10/02/12 10:36 AM
Re: Double rifle project, calibre 9.3x74R	Ron_Vella	23/02/12 12:57 PM
Re: Double rifle project, calibre 9.3x74R	AkMike	23/02/12 03:52 PM
Re: Double rifle project, calibre 9.3x74R	Ron_Vella	24/02/12 05:16 AM
Re: Double rifle project, calibre 9.3x74R	DarylS	24/02/12 06:19 AM
Re: Double rifle project, calibre 9.3x74R	AkMike	24/02/12 06:32 AM
Re: Double rifle project, calibre 9.3x74R	Ron_Vella	17/05/13 02:26 AM
Re: Double rifle project, calibre 9.3x74R	Ckhobart	30/06/13 08:56 AM
Re: Double rifle project, calibre 9.3x74R	Ron_Vella	11/07/13 02:44 AM
Re: Double rifle project, calibre 9.3x74R	DarylS	11/07/13 09:41 AM
Re: Double rifle project, calibre 9.3x74R	gallatin	14/07/13 09:32 AM
Re: Double rifle project, calibre 9.3x74R	Ckhobart	15/07/13 06:40 PM
Re: Double rifle project, calibre 9.3x74R	Rhodes	16/07/13 06:54 PM
Re: Double rifle project, calibre 9.3x74R	Rhodes	16/07/13 07:33 PM
Re: Double rifle project, calibre 9.3x74R	Ron_Vella	17/07/13 05:02 AM
Re: Double rifle project, calibre 9.3x74R	Rhodes	17/07/13 06:06 PM
Re: Double rifle project, calibre 9.3x74R	Ron_Vella	18/07/13 06:16 AM
Re: Double rifle project, calibre 9.3x74R	Rhodes	18/07/13 07:55 PM
Re: Double rifle project, calibre 9.3x74R	Ron_Vella	22/07/13 12:07 PM
Re: Double rifle project, calibre 9.3x74R	Rhodes	28/07/13 03:08 PM
Re: Double rifle project, calibre 9.3x74R	Ron_Vella	18/09/13 05:25 AM
Re: Double rifle project, calibre 9.3x74R	Ckhobart	18/09/13 07:40 AM
Re: Double rifle project, calibre 9.3x74R	Ron_Vella	19/09/13 02:17 AM
Re: Double rifle project, calibre 9.3x74R	Igorrock	19/09/13 06:02 AM
Re: Double rifle project, calibre 9.3x74R	gallatin	04/05/13 06:35 AM
Re: Double rifle project, calibre 9.3x74R	Ron_Vella	06/05/13 12:58 PM
Re: Double rifle project, calibre 9.3x74R	transvaal	07/05/13 02:54 AM
Re: Double rifle project, calibre 9.3x74R	gallatin	10/05/13 01:29 PM
Re: Double rifle project, calibre 9.3x74R	Ron_Vella	16/05/13 07:08 AM
Re: Double rifle project, calibre 9.3x74R	Huvius	16/05/13 09:17 AM
Re: Double rifle project, calibre 9.3x74R	Rhodes	16/05/13 07:57 PM
Re: Double rifle project, calibre 9.3x74R	Even	08/04/13 08:42 PM
Re: Double rifle project, calibre 9.3x74R	nitro450exp	09/04/13 10:44 AM
Re: Double rifle project, calibre 9.3x74R	Ron_Vella	09/04/13 11:25 AM
Re: Double rifle project, calibre 9.3x74R	Even	09/04/13 08:18 PM
Re: Double rifle project, calibre 9.3x74R	Sville	09/04/13 11:12 PM
Re: Double rifle project, calibre 9.3x74R	Caprivi	10/04/13 12:54 AM
Re: Double rifle project, calibre 9.3x74R	Caprivi	10/04/13 12:56 AM
Re: Double rifle project, calibre 9.3x74R	DarylS	10/04/13 01:06 AM
Re: Double rifle project, calibre 9.3x74R	Ron_Vella	10/04/13 02:17 AM
Re: Double rifle project, calibre 9.3x74R	Ron_Vella	24/02/12 01:05 PM
Re: Double rifle project, calibre 9.3x74R	AkMike	24/02/12 04:48 PM
Re: Double rifle project, calibre 9.3x74R	chipmaker	04/03/12 03:39 PM
Re: Double rifle project, calibre 9.3x74R	Ron_Vella	30/03/12 03:34 AM
Re: Double rifle project, calibre 9.3x74R	Sarg	30/03/12 09:06 AM
Re: Double rifle project, calibre 9.3x74R	buckbrush	05/04/12 06:50 AM
Re: Double rifle project, calibre 9.3x74R	Ron_Vella	02/07/12 10:23 AM
Re: Double rifle project, calibre 9.3x74R	Birdhunter50	07/07/12 09:12 AM
Re: Double rifle project, calibre 9.3x74R	Ron_Vella	07/07/12 10:56 AM
Re: Double rifle project, calibre 9.3x74R	4al2	07/07/12 12:05 PM
Re: Double rifle project, calibre 9.3x74R	Ron_Vella	11/07/12 09:05 AM
Re: Double rifle project, calibre 9.3x74R	Ron_Vella	27/07/12 03:30 AM
Re: Double rifle project, calibre 9.3x74R	Ron_Vella	29/07/12 08:10 AM
Re: Double rifle project, calibre 9.3x74R	Ron_Vella	01/08/12 12:30 PM
Re: Double rifle project, calibre 9.3x74R	FrankFarmer	09/08/12 02:40 AM
Re: Double rifle project, calibre 9.3x74R	Ron_Vella	09/08/12 10:49 AM
Re: Double rifle project, calibre 9.3x74R	Ron_Vella	29/08/12 02:08 AM
Re: Double rifle project, calibre 9.3x74R	Igorrock	30/08/12 06:12 AM
Re: Double rifle project, calibre 9.3x74R	Ron_Vella	30/08/12 08:09 AM
Re: Double rifle project, calibre 9.3x74R	Igorrock	30/08/12 03:27 PM
Re: Double rifle project, calibre 9.3x74R	Ron_Vella	10/09/12 01:12 AM
Re: Double rifle project, calibre 9.3x74R	Northman	28/10/12 11:31 PM
Re: Double rifle project, calibre 9.3x74R	Ron_Vella	17/03/13 11:08 AM
Re: Double rifle project, calibre 9.3x74R	Matabele	18/03/13 03:23 AM
Re: Double rifle project, calibre 9.3x74R	Ron_Vella	18/03/13 05:03 AM
Re: Double rifle project, calibre 9.3x74R	transvaal	18/03/13 05:35 AM
Re: Double rifle project, calibre 9.3x74R	Ron_Vella	18/03/13 12:40 PM
Re: Double rifle project, calibre 9.3x74R	Matabele	19/03/13 07:46 PM
Re: Double rifle project, calibre 9.3x74R	felix	08/04/13 09:42 AM
Re: Double rifle project, calibre 9.3x74R	Igorrock	02/07/12 04:43 PM
Re: Double rifle project, calibre 9.3x74R	Ron_Vella	30/03/12 05:06 AM
Re: Double rifle project, calibre 9.3x74R	MaxGera	24/02/12 12:00 PM
Re: Double rifle project, calibre 9.3x74R	Ron_Vella	31/01/12 11:15 PM
Re: Double rifle project, calibre 9.3x74R	AkMike	01/02/12 05:52 AM
Re: Double rifle project, calibre 9.3x74R	Ron_Vella	07/07/11 11:02 AM

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