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loads for 7x57 mauser
 Moderated by: woodsman777, Timberghozt
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 Posted: Tue Jan 17th, 2012 04:19 PM
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cowboyinmontana
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Joined: Fri Nov 11th, 2011
Location: Missoula, Montana USA
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Favorite type of cartridge to load?: rifle
My favorite chambering is:: old stand-by proven calibers
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I NEED HELP SELECTING THE BEST POWDER FOR MY 7X57 MAUSER.
THANKS



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cowboyinmontana


 Posted: Tue Jan 17th, 2012 05:11 PM
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swampshooter
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Joined: Sun Aug 3rd, 2008
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My favorite chambering is:: .204 Ruger
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I think either IMR or H-4350 are hard to beat.



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 Posted: Tue Jan 17th, 2012 05:20 PM
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BEAR
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i use Varget



 Posted: Tue Jan 17th, 2012 08:21 PM
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Paul B
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cowboyinmontana wrote:
I NEED HELP SELECTING THE BEST POWDER FOR MY 7X57 MAUSER.
THANKS


Normally, I would suggest either W760 or H414 but considering where you live I'll go with H4350SC. My choice down here in Arizona is W760. (H414 is the same powder under Hodgen's name.) I do my load work ups in the summer when it's 100 degrees or more. Any top load that is safe at those temps will/should be safe during deer season which depending on where I am in the state can run from 32 degrees to 80 degrees.
H4350SC is supposed to not be temperature sensitive where W760/H414 is reputed to be so. The last jug of H4350SC I bought said H4350 Extreme so it's the short cut version that is temp insensitive.
I will say that when W760 is working at a temp level that keeps it happy that it delivers great velocity and accuracy. it does so in the three 7x57 rifles I own, two factory jobs and a custom on a commercial FN Mauser action.
Using W760, I have pushed the 140 gr. Nosler Ballistic Tip to 2880 FPS on a 110 degree day. The bolt was only very slightly sticky on opening and at the lower temps of deer season probably would have been OK. I decided to just cut it back a hair to the 2800 FPS level just in case.
I won't give the data for that load as it is well over anything in any book.
Lately, while doing so research on the cartridge I saw all thse stories of how effective the round was with the 173/175 gr. round nose bullets in the 2300 FPS range. It got me to thinking, were they really that good? Tey just might have benn and what little range work I've done has impressed me.
I've mentioned this before but Federal brand 7x57 ammo with the 175 gr. bullet in in my opinion JUNK! The first 7x57 I ever owned as a sporter based on an 1893 Mauser built up in some small British gun shop. The hardware store in that small western town I was living in at the time only had three boxes of that ammo, the 175 gr. Feds. Deer season was only about a week away and I didn't have much time to find dies or do load work up so went with that ammo. I had a nice broadside shot at a nice eating sized Mule Deer and put that bullet right into the sticking place. I had no doubt of where that bullet went. Hat deer took of like a rocket into a buch of brush and disappeared. My wife and I waited a bit and went looking. That deer was shot at about 8 in the morning and when the sun went down that day, we still hadn't found it. :sad: I found what the coyotes and scavengers left the next morning. A fellow made me an offer I couldn't refuse so when I moved from Nevada to Arizone I was without a 7x57 for a while. I found one on a Ruger M77 and about a year later got a chronograph. I had two and a half boxes of that ammo left so I ran some over the chronograph. Federal says that ammo does 2400 FPS from their test barrel. That ammo did 2010 FPS from my rifle. The Ruger ent down the road for some ersason or another and I got a Ruger #1A in 7x57 but is was so inaccurate that it went back to Ruger.
By that time I commisioned my gunsmith to take a commercial FN Mauser I had and rebarrel and restock it into something I wanted. The cartridge was the 7x57. A short time later I fell into a Winchester M70 Feather weight. My 7x57's runneth over. :cool:
Just for spits and grins, I ran some more of that ammo over the chrony with all thre rifles. The Ruger did just barely 2000 FPS, the Winchester 2010 FPS and the custom mauser 2050 FPS. That's a far cry from 2400 FPS. FWIW, IIRC, it was in a Handloader magazine article where gun writer John Barsness stated that he shot some recent 175 gr. federal ammo through his 7x57 rifle and registered 2010 FPS. mademe feel good that I found a back up source on that velocity.
I mentioned plaing with loads duplicating the original 7x57 ammo. The load is in the Winchester loading booklets they give away and is a 175 gr. SP over 44.0 gr. of W760 for 2400 FPS at 44,500 C.U.P. The Ruger and Winchester ran 2310 to 2330 FPS. The eye opener was the custom Mauser which did a full 2410 FPS. My 140 gr. Nosler BT load worked just fine in the two factory rifles but will lock up the bolt on the custom.
Currently, I'm looking at the 120 and 140 gr. Barnes TSX bullets and the 150 gr. Nosler Partitions as I got a smokin' deal on the Noslers fo $10 a box. I got 6 boxes of 150 gr. 270s and 5 boxes of 150 gr. 7MMs and one box of 160 gr. PTs that I'll probably use in my .280 Rem. if not the 7x57.
The more I play with that cartridge, the more I like it.
Paul B.



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