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Double Rifles, Single Shots & Combinations >> Double Rifles

doublegunfan
.275 member

Reged: 26/04/05
Posts: 60
Loc: Brazil

Re: Proof loads
22/11/05 10:57 PM

Unspellable,

Thanks for your comments. I was looking into every book I have (it does not seem that I have enough books) to find some data on the correlation between powder charge increase versus pressure increase.

As far as I can see from the previous messages I have learned the following (please everyone, correct me if any statement is incorrect):

1) To safely proove any gun, you must fire it remotely by means of a long string attached to the trigger and the gun must be in a sort of "fixture" that holds it in place. Shooter must be protected to avoid injuries;

2) As for the loads to be used we have two methods in discussion here:

a) Increase pressure 30% by means of increasing the powder charge of a maximum working load by 7%.

This looks like a good rule of thumb, but I think that two important considerations must be included: the proportion of charge X pressure increase may be considerably different from one powder to another, and, without any means of measuring the pressure, how can one be sure of the pressure in tests?

b) As an alternate method, increase muzzle energy 10% by means of increasing bullet weight 10% on top of a maximum working load.

Does anyone know if an increase in bullet weight would correlate to a proportional increase in pressure, i.e., if by increasing 10% of bullet weight, pressure will also be 10% higher?

As a side note, I have been thinking that, whenever someone mentions any change in a double rifle or shotgun, we tend to think of proofing or re-proofing. How many bolt action owners have rebarreled their rifles and never given any thought of re-proofing them after the change?

Fred

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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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