8x57js load.

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I have been steady working up a recipe for 8x57 to hunt with out of my M48A. It is a brand new unissued rifle, so plenty strong. Don't take this recipe and just throw it together in any old 8mm. It is max load for "MY RIFLE". The primer is flat but not bulged. here it goes... Remington Brass trimmed with Lee case trimmer. Remington 9 1/2 primer, 150 grain Hornaday Interlock SP. 55.3 grains of Winchester 748. Don't have the OAL in hand, but it is seated just enough to clear the box, and it is not jammed in the lands. When I go back downstairs Ill look up the measurement. It is clocking dern near 2900fps 10 ft from the muzzle, they are clocking in around 2880 to 2890. Anyways.... I have really come to respect this round as it is really potent. I am also wondering why there is not a bigger fan base here... mabye because we drive Fords and Chevys and hate BMW's, but this thing thumps.... I just shot a doe this afternoon with it, and the exit hole looked fairly small... but she dropped in her tracks. It was behind the shoulder a little on the high side, but still center..... not a spine shot. When I skinned it out and gutted it was when the truth came out... The damage that was done was something that shocked me. The exit side, half the shoulderblade was outside of her body, but not out of the skin. There was a huge amount of blooding, but no meat was ruined. Everything in the ribcage was liquid including heart.. kind of reminds me of a .223, but on a macro scale. There was not very much blood as I was dragging her out, and only a little in the truck. I didn't find fragments or multiple exits, but im thinking that mabye the bullet came apart too fast and dumped inside this queen. Possibly lacking weight retention to punch a big exit hole and paint the forest, but hea... It worked pretty well... It was a 70 yard shot BTW through a reciever sight, and standard front blade. Mabye I should slow it down or try a bonded 180 grain.... What do you guys think??????????
 
I'd back the load down to max published data. The Hornady data for their 150gr soft point bullet in my compiled 8mm manual lists 51.6 gr of W748 as maximum charge running 2,900 fps from their Mauser 98. While your rifle is still holding together with 4 more grains of powder the velocity gain if any probably isn't as much as you may think. A 150 grain bullet at 2,900 fps is right at 300 Win mag velocities for a 150 gr bullet though the 8mm .311 bullet will not have as good a ballistic coefficient as the .30 cal.
 
I've tried from 50 grains to where I am at in baby steps. Published max un the new hornaday manual says 56.2 is at 2900 out of a 23 inch barrel. I'd believe it. I'm just showing signs of pressure so I'm gonna stop! Most def gonna back down as the deer will never know the difference and bullet may hold together better. When I come across some of the Nosler's ill pick up a box and try them... My fps is right on the money from what hornaday has published.. Just. Not gonna try their max! Mabye if I had a test rifle with a blast shield!
 
If I can make a 308 Win(7.62x51) 150gr go 2900fps, then a 8x57 150gr should be able to do the same or better. Nosler manual has 200gr 8x57 faster than a 200gr 30-06(7.62x63).

"Lyman 43rd manual" 1964: IMR4895 powder max loads
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150gr..54gr..2920fps

http://data.hodgdon.com/cartridge_load.asp
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150gr..51.0gr..2987fps...49,500cup

I use Varget for 125gr, 150gr, and 200gr bullets in 8x57.

8x57 is a lot of fun.
 
Ken Waters - Pet Loads

Ken W. had some interesting comments and data regarding the 8x57 - don't recall word for word, but he loaded the 150 gr just shy of 3000 fps in a 24" 1933 Oberndorf K98. He got out the dead horse, of course, and beat it soundly with the gun butt, and later (80's & 90's) whipped it out again and shot it dead with a Siskiyou barrelled Parker-Hale. Good reading and huge source of detailed loading info for just about every caliber ever shot. I think it belongs in every reloaders library of manuals - the practical application of the data is a literal diamond mine... :cool:
 
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