Does anyone have at their finger-tips a comparison of powder capacity for the 8x57 and 7.62x54R?
Thanks...
Con

Con,

This data is based upon a small sample size (two or three measured cases)

7.62X54R (Graf Brass) - 64 grains of water

8X57 Mauser - R-P brass - 60 grains of water.

Of course there will be some small variation between individual cases, but those numbers will get you in the ballpark.

Note: The Graf brass is very thin, and I would wager that Lapua 7.62X53R brass has a capacity closer to 58 - 60 grains of water (don't know though as I have never had any to measure).

Scott

I shoot:



8mm 200 gr 47 gr 4895 2630 fps[sticky bolt at 50~52] Quickload says will hold 53.2 gr with this bullet.



7.62x54 180 gr 47 gr 4895 2750 fps[sticky bolt at 50] Quickload says will hold 54.5 gr with this bullet.



If I switched to 180 gr bullets for 8mm to make it fair, the 8mm would go up to 53.8 gr capacity. That would mean, for same wieght bullets that the Russian cartridge has 1.3% more capacity.

Con, For what its worth, my "Load From A Disk" program gives 60gr. water as the case capac. of the 8 x 57 Mau. while the 7.62 x 54R is unlisted. However, following Wm. C. Davis, Jr.'s article, "Some Simplified Interior Ballistics for Handloaders" in the NRA's "Handloading" (1977), I got 65gr. water for the 7.62 x 54R using Hansen brass. Sorry I couldn't post this earlier, but we had a loss of power earlier today (Feb. 3). ...Maven

"Quickload" lists H2O capacity of 8x57 @ 63gr, 7.62x54R @ 64gr

Thanks for the info. Now does anyone have experience with using the Turkish flake powder from ex-mil 8x57 ammunition in the 7.62x54R? I've got the powder and want to try it behind a 123gr or 150gr projectile in the 7.62x54R for military rifle competition.
Cheers...
Con