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Double Rifles, Single Shots & Combinations >> Double Rifles

freischuetz
.224 member

Reged: 05/04/04
Posts: 23

Re: 8X57JR(S) question
17/10/07 07:16 AM

IS ( i s ) i, standing for infantry, (not JS) are 323 Bullet size Barrel 7.89mm lands and 8.20 grove diameter.
I or ( i ) are 318 bullets barrel 7.80mm lands and 8.07mm grove

The added "R" on both version is for Rimmed ( Rand ) Cases.

Bullet diameter is on all "S" loadings 8.22mm for non "S" diameter is 8.09mm

Standard Pressure for "IS" is 3400 bar
" for "IRS" is 2900 bar (Rimmed)
" for "I" is 3300 bar
" for "IR" is 2800 bar (Rimmed)

to complicate the issue you also get a 8x57R_360 that uses only a bullet diameter of 8.09mm and is loaded to a maximum of 2200 bar

1 bar = 14.50PSI

1 mm = 0,03937008 inches

Best slug the barrel if there is not a "S" with the caliber marking on the barrel!

and you cant use load data for rimless cases for rimmed cases pressure would be to high!

Hope this make sense to you

--------------------
Time is your treasure use it wisely you can never replace it

Post Extras

Entire topic
Subject	Posted by	Posted on
8X57JR(S) question	bonanza	17/10/07 04:56 AM
Re: 8X57JR(S) question	DUGABOY1	23/10/07 08:28 AM
Re: 8X57JR(S) question	xausa	18/10/07 07:29 AM
Re: 8X57JR(S) question	zimhunter	19/10/07 12:01 AM
Re: 8X57JR(S) question	Kalunga	17/10/07 07:23 AM
Re: 8X57JR(S) question	zimhunter	17/10/07 07:34 AM
Re: 8X57JR(S) question	bonanza	17/10/07 10:56 AM
Re: 8X57JR(S) question	fuhrmann	18/10/07 02:39 AM
Re: 8X57JR(S) question	freischuetz	17/10/07 06:22 PM
Re: 8X57JR(S) question	fraserdouble	17/10/07 09:12 PM
Re: 8X57JR(S) question	freischuetz	19/10/07 12:12 PM
Re: 8X57JR(S) question	freischuetz	17/10/07 07:16 AM
Re: 8X57JR(S) question	400NitroExpress	19/10/07 02:16 AM
Re: 8X57JR(S) question	freischuetz	19/10/07 11:19 AM
Re: 8X57JR(S) question	400NitroExpress	19/10/07 01:45 PM

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