Re: 8x57 data?
Why are American 8x57mm published load data such garbage?
A) The 8x57mm case head is patterned after the 1889 7.65x53mm cartridge. When built with large Boxer primer pockets is good for 67,000 psi handloads for an individual rifle with long brass life [primer pockets do not get loose quickly].
The SAAMI registered pressure for the 8x57mm is 35,000 psi or 37,000 c.u.p.
B) Likewise the 6mmRem and 270Win are patterned after the 1889 7.65x53mm cartridge. When built with large Boxer primer pockets is good for 67,000 psi handloads for an individual rifle with long brass life [primer pockets do not get loose quickly].
The SAAMI registered pressure for the 6mmRem and 270Win are 65,000 psi.
C) How did the 8x57mm ever get registered at SAAMI with such low pressures?
The answer is confusion between the 1888 pattern .318" bullet and the 1905 pattern .323" bullet intended for the 1898 Mauser rifle.
Bullet diameter 8.08 mm / .318 (I and IR) and 8.20 / .323" (IS and IRS)
This ammo has 0.319" bullets in Remington's effort to split the difference.
Is the 220 gr Sierra only for 8mmRemMag rifles?
I got a 1903-1905 Turkish Mauser for $50 from BIG5 in 2004.
I shortened and recrowned the barrel at 27.5":
A) With 47 gr bulk IMR4895 [acts like H322] and 200 gr Sierra Match King I got a 1" 5 shot group at 100 meters with these velocities with that load: 2618, 2633, 2649, 2623, 2650, 2626, 2638 fps.
B) 48 gr. bulk IMR4895 220 gr. Sierra 2420, 3.22", measured
2600 - 2625 fps 1.1" 5 shot group @50 yards No extractor groove growth.
The velocities from my 8x57mm with the 220 gr bullet are what would be 180 yards from the muzzle of an 8mmRemMag.
Any internet braggart with an 8mmRemMag is killing bull elk at 800 yards, so make sure you are within 620 yards of the bull elk with your 8x57mm rifle and that bullet
