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Double Rifles, Single Shots & Combinations >> Double Rifles

Marrakai
.416 member

Reged: 09/01/03
Posts: 3591
Loc: Darwin, Top End of Australia

Re: Working up a double rifle load that regulates.
21/05/24 09:15 AM

A point to stress here is the need for a chronograph in developing loads for double rifles, particularly vintage Brit examples.

The normal pressure signs for modern bolt rifles are not obvious at the lower limits of older break-open actions. To continue adding powder to bring the barrel-groups together with no attention to pressure is folly, and the only surrogate for pressure available to the layperson is existing published velocity.

So working up to achieve regulation (with medium/slow to slow powder) is fine, provided that the published velocity is not exceeded. If that velocity is reached before regulation is achieved, then change powder or projectile. It is potentially dangerous to continue increasing the powder charge.

If regulation simply can't be achieved after all load possibilities are tried, then the barrels need re-regulation. If this step is taken, at least the rifle can be regulated for a sensible pet load with consistently available components.

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Marrakai
When the bull drops, the bullshit stops!
--------------------------------
www.marrakai-adventure.com.au

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Subject	Posted by	Posted on
Working up a double rifle load that regulates.	casper50	16/05/24 08:17 AM
Re: Working up a double rifle load that regulates.	mauserand9mm	16/05/24 11:58 AM
Re: Working up a double rifle load that regulates.	CptCurl	16/05/24 08:24 PM
Re: Working up a double rifle load that regulates.	casper50	17/05/24 01:07 AM
Re: Working up a double rifle load that regulates.	LTK	17/05/24 11:47 AM
Re: Working up a double rifle load that regulates.	LRF	19/05/24 09:22 PM
Re: Working up a double rifle load that regulates.	grandveneur	19/05/24 11:50 PM
Re: Working up a double rifle load that regulates.	DarylS	20/05/24 03:10 AM
Re: Working up a double rifle load that regulates.	NitroX	20/05/24 10:39 PM
Re: Working up a double rifle load that regulates.	Marrakai	21/05/24 09:15 AM
Re: Working up a double rifle load that regulates.	transvaal	22/05/24 01:02 AM
Re: Working up a double rifle load that regulates.	DarylS	22/05/24 01:37 AM
Re: Working up a double rifle load that regulates.	NitroX	19/05/24 06:54 PM

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