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Double Rifles, Single Shots & Combinations >> Double Rifles

unspellable
.300 member

Reged: 06/03/04
Posts: 187
Loc: Iowa

Re: Proof loads
22/11/05 10:43 AM

If I were obliged to proof a smokeless chambered rifle for my own purposes, I would take the heaviest bullet intended for a working load. I would then take the maximum powder charge for that working load and increase it by 7%. As a back of the envelope calculation that would increase the pressure by 31%. (As a rule of thumb, pressure is proportional to the fourth power of the powder charge. Shows that you really don't want to go over max in a working load.) If the maximum charge is a slow powder case filler you may have to go to the maximum charge listed for the next faster powder and add 7% to the listed charge. Generally smokeless proof loads use a standard weight bullet with a higher or faster than normal powder charge. Use of a heavier than standard bullet is common in black powder proof loads.

If not a wildcat, the heaviest intended load would be at minimum the heaviest commercially available load now or in the past.

It should be noted, that if the pressure is too high you can have a brass failure and damage the gun even though the gun itself would be able to withstand the pressure. It's generally figured that the strongest brass may begin to flow if you go beyond 70,000 cup. Some cases will fail before that. A 444 marlin case should be fairly strong.

And tie the rifle to some tires, hide behind a big tree, and use a long long string to pull the trigger.

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Subject	Posted by	Posted on
Proof loads	doublegunfan	18/11/05 07:44 AM
Re: Proof loads	Birdhunter50	08/04/16 10:55 PM
Re: Proof loads	Birdhunter50	30/05/15 10:38 PM
Re: Proof loads	Grenadier	27/02/08 12:06 PM
Re: Proof loads	Bramble	29/02/08 04:25 AM
Re: Proof loads	4seventy	21/07/08 05:04 PM
Re: Proof loads	Bramble	22/07/08 11:18 AM
Re: Proof loads	Tatume	22/07/08 08:49 PM
Re: Proof loads	9.3x57	25/07/08 11:44 AM
Re: Proof loads	450_366	25/07/08 04:00 AM
Re: Proof loads	Bramble	23/07/08 06:49 AM
Re: Proof loads	Birdhunter50	23/07/08 09:51 AM
Re: Proof loads	Grenadier	23/03/08 09:09 AM
Re: Proof loads	450_366	09/06/08 11:09 PM
Re: Proof loads	Grenadier	29/02/08 05:43 AM
Re: Proof loads	Bramble	29/02/08 08:06 AM
Re: Proof loads	Sarg	29/02/08 08:22 AM
Re: Proof loads	Marrakai	28/02/08 02:07 PM
Re: Proof loads	Grenadier	29/02/08 05:08 AM
Re: Proof loads	Sarg	28/02/08 07:51 PM
Re: Proof loads	Grenadier	29/02/08 05:14 AM
Re: Proof loads	Judson	17/11/05 11:10 AM
Re: Proof loads	Tom_Bigbore	18/11/05 12:14 AM
Re: Proof loads	577Robert	23/11/05 08:57 PM
Re: Proof loads	doublegunfan	24/11/05 12:48 AM
Re: Proof loads	mickey	17/11/05 11:56 AM
Re: Proof loads	doublegunfan	17/11/05 09:54 PM
Re: Proof loads	banzaibird	17/11/05 11:08 PM
Re: Proof loads	iwantadouble	18/11/05 12:36 AM
Re: Proof loads	banzaibird	18/11/05 01:03 AM
Re: Proof loads	Tom_Bigbore	18/11/05 02:04 AM
Re: Proof loads	banzaibird	18/11/05 07:44 AM
Re: Proof loads	unspellable	22/11/05 10:43 AM
Re: Proof loads	doublegunfan	22/11/05 10:57 PM
Re: Proof loads	unspellable	23/11/05 06:10 AM
Re: Proof loads	DarylS	23/11/05 10:31 AM
Re: Proof loads	hoppdoc	24/03/06 10:33 AM
Re: Proof loads	DarylS	26/03/06 04:05 AM
Re: Proof loads	hoppdoc	26/03/06 03:02 PM
Re: Proof loads	400NitroExpress	27/08/07 06:38 AM
Re: Proof loads	9.3x57	27/08/07 06:47 AM
Re: Proof loads	DarylS	27/03/06 03:11 AM
Re: Proof loads	Bramble	12/02/07 06:48 AM
Re: Proof loads	308	12/02/07 02:45 PM
Re: Proof loads	Raff	13/02/07 02:38 AM
Re: Proof loads	9.3x57	08/06/07 11:41 PM
Re: Proof loads	Marrakai	09/06/07 08:52 AM
Re: Proof loads	bonanza	27/08/07 08:37 AM
Re: Proof loads	beleg2	02/09/07 01:59 PM
Re: Proof loads	9.3x57	09/06/07 09:37 AM
Re: Proof loads	larcher	01/03/07 05:37 AM
Re: Proof loads	pistolchamp	29/03/07 05:38 AM
Re: Proof loads	Bramble	29/03/07 09:49 AM
Re: Proof loads	Peterb	23/11/05 12:13 PM
Re: Proof loads	500Nitro	24/11/05 01:33 AM
Re: Proof loads	Peterb	24/11/05 08:58 AM
Re: Proof loads	theprof1	07/07/19 02:17 PM
Re: Proof loads	crshelton	08/07/19 12:50 AM
Re: Proof loads	Wayne59	09/04/16 12:40 AM
Re: Proof loads	Kaimiloa	16/04/09 11:50 AM
Re: Proof loads	Huvius	16/04/09 01:25 PM
Re: Proof loads	Bramble	16/04/09 07:30 PM
Re: Proof loads	Huvius	16/04/09 11:09 PM
Re: Proof loads	450_366	16/04/09 07:59 PM
Re: Proof loads	9.3x57	16/04/09 11:18 PM
Re: Proof loads	DarylS	17/04/09 12:07 AM
Re: Proof loads	KWK	13/07/10 12:32 PM
Re: Proof loads	DarylS	14/07/10 12:44 AM
Re: Proof loads	KWK	14/07/10 01:26 AM
Re: Proof loads	CraigK	21/11/10 06:18 PM
Re: Proof loads	beleg2	28/11/10 11:15 PM
Re: Proof loads	DoubleRifle999	06/06/12 09:45 AM
Re: Proof loads	enfieldspares	25/07/07 05:36 AM
Re: Proof loads	Vinnie	18/06/07 09:20 PM
Re: Proof loads	Rich	04/08/07 11:56 AM
Re: Proof loads	9.3x57	18/06/07 10:31 PM
Re: Proof loads	Vinnie	18/06/07 11:33 PM
Re: Proof loads	dnovo	18/06/07 11:22 PM
Re: Proof loads	doublegunfan	24/11/05 10:09 PM
Re: Proof loads	Peterb	25/11/05 03:48 AM
Re: Proof loads	Judson	03/12/05 10:57 AM
Re: Proof loads	k80	23/11/05 12:03 PM
Re: Proof loads	500Nitro	22/11/05 11:30 PM
Re: Proof loads	mickey	18/11/05 01:58 AM
Re: Proof loads	400NitroExpress	17/11/05 05:26 AM
Re: Proof loads	Peterb	17/11/05 04:19 AM
Re: Proof loads	foxfire	17/11/05 02:15 AM

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