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7X57 Mag
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Necked down my 8x57 mag and I have the rifle now and just fire formed some brass today. Will work on loads soon and everything is working well. Will list load results as I get them worked up. Merry Christmas all. Thanks.
 
Posts: 296 | Location: Missouri | Registered: 22 May 2007Reply With Quote
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quote:
8x57 mag


What is a 8x57 Mag?

I know of an I, IR, IRS, IS, PCC, R, and Mauser but not a Magnum.
 
Posts: 2650 | Location: Lakewood, CO | Registered: 15 February 2003Reply With Quote
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I shortened the 375 Ruger to 57mm to specifically work in a Mauser 98. It is documented in a thread below. Worked very well this deer season, a little overkill for whitetail, though.
 
Posts: 296 | Location: Missouri | Registered: 22 May 2007Reply With Quote
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Thanks, I didn't see the other thread, sounds interesting.
 
Posts: 2650 | Location: Lakewood, CO | Registered: 15 February 2003Reply With Quote
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The cold has dampered things. But got my 9.3x57 Mag prototype firing with fireforming loads of cream of wheat. Waiting for dies to get it going. I think it might be my favorite of the bunch. Happy New Years everyone?
 
Posts: 296 | Location: Missouri | Registered: 22 May 2007Reply With Quote
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Finally warmed up enough to go shoot. Did an initial load work up. I used Hornady data from the 7mm Rem short action ultra mag as a guide and started below their starting load and was conservative. There is more capacity left after the max load I shot today. Will go beyond that next time out to the range. The loads were a 154 Hornady Interlocks and I was using IMR 4831. Results are for a three shot group average and are as follows:

48 grains 2247 fps
50 grains 2328 fps
52 grains 2511 fps
54 grains 2711 fps
56 grains 2763 fps
57 grains 2789 fps
58 grains 2859 fps

I think it will perform right along with the other 7 mags and is right where I wanted it to be. Thanks.
 
Posts: 296 | Location: Missouri | Registered: 22 May 2007Reply With Quote
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Worked up to 60 grains of IMR 4831 and got to 3000 fps. Will start on loads for 160 and 175 bullets. I think it works well, but the 7mm space is pretty crowded. I think the 9.3 version might be the best of the bunch, if it will duplicate the 9.3x64, waiting on dies.
 
Posts: 296 | Location: Missouri | Registered: 22 May 2007Reply With Quote
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