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Double Rifles, Single Shots & Combinations >> Double Rifles

DarylS
.700 member

Reged: 10/08/05
Posts: 27509
Loc: Beautiful British Columbia, Ca...

Re: .577 BPE
02/12/09 03:36 AM

Deeper seating will in many guns, increase pressures, sometimes considerably if the original longer seating still cleared the rifling to start with. There are so many vaiables in handloading, one must work up his own loads.

Straight cases are the most difficult to work with, as they don't have a shoulder, which helps hold back the powder to get goo dignition started. At the bullet moves forward, just a small amount, the expansion ratio is hugely effected, dropping pressures and the 'flame'.

Thus, being able to use a compressed or at least a full case of easily ignited powder (or stronger primers) is the best scenario for straight cases. Years ago, John Buhmiller has such problems himself with straight cases and wrote about it. He resorted to testing with double primers - one in the pocket and another on top of the powder undeneath the bullet. I did similar testing in a strong bolt action rifle. I am not suggesting anyone try this, as I mention it only for others to gain an understanding that there is a real problem with ignition in straight cases and means must be found by each and every loader to circumvent the difficulties.

Again, I would not do this in a double of vintage and would not suggest anyone try it - period.

--------------------
Daryl

"a gun without hammers is like a Spaniel without ears" King George V

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Subject	Posted by	Posted on
.577 BPE	bonanza	30/11/09 11:18 AM
Re: .577 BPE	BlainSmipy	30/11/09 02:41 PM
Re: .577 BPE	bonanza	30/11/09 09:08 PM
Re: .577 BPE	BlainSmipy	01/12/09 01:00 AM
Re: .577 BPE	DarylS	01/12/09 01:54 AM
Re: .577 BPE	CptCurl	30/11/09 11:07 PM
Re: .577 BPE	bonanza	02/12/09 01:44 AM
Re: .577 BPE	DarylS	02/12/09 03:36 AM
Re: .577 BPE	horsedoc49	02/12/09 05:34 AM
Re: .577 BPE	tinker	02/12/09 06:31 AM
Re: .577 BPE	CptCurl	02/12/09 07:55 AM
Re: .577 BPE	Watson577	02/12/09 01:11 PM
Re: .577 BPE	mauserand9mm	02/12/09 02:24 PM
Re: .577 BPE	50Calshtr	03/12/09 01:07 PM
Re: .577 BPE	bonanza	04/12/09 09:16 AM
Re: .577 BPE	50Calshtr	04/12/09 01:25 PM
Re: .577 BPE	BlainSmipy	07/12/09 04:27 AM
Re: .577 BPE	bonanza	07/12/09 04:53 AM
Re: .577 BPE	BlainSmipy	07/12/09 05:48 AM
Re: .577 BPE	nopride2	07/12/09 07:01 AM
Re: .577 BPE	50Calshtr	08/12/09 01:54 PM
Re: .577 BPE	50Calshtr	08/12/09 11:32 PM
Re: .577 BPE	DarylS	09/12/09 01:25 AM
Re: .577 BPE	nopride2	10/12/09 05:04 PM
Re: .577 BPE	DarylS	11/12/09 03:23 AM
Re: .577 BPE	Watson577	11/12/09 11:47 AM
Re: .577 BPE	DarylS	11/12/09 12:50 PM
Re: .577 BPE	DarylS	11/12/09 01:21 PM
Re: .577 BPE	Watson577	11/12/09 02:07 PM
Re: .577 BPE	DarylS	12/12/09 03:55 AM
Re: .577 BPE	tinker	04/12/09 07:27 AM
Re: .577 BPE	Sarg	02/12/09 07:30 AM
Re: .577 BPE	horsedoc49	02/12/09 07:54 AM

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