7x57 load info, again....

jmstr · June 6, 2013, 04:46 PM

Hello Everyone,

I was just trying to get a sense of things before I buy powders that may be useless for me.

I have 4 rifles I could reload for, but only one I am asking about right now: my 1895 Chilean Mauser in 7x57.

I have about 800 pulled 170-175gr Spitzer bullets pulled from FN-made surplus ammo [made around 1970 in Belgium] that I want to begin loading for.

My rifle has the factory barrel and seems to really like this bullet weight.

Once I burn up ALL of my surplus ammo and rounds, then I may rebarrel [I have an Adams and Barnett barrel in the wrapper waiting] and move to a lower bullet weight.

My primary use for the rifle is plinking/target use. Don't take this the wrong way: I don't hunt. I have nothing against it, but bullet and bullet selection for dropping deer/antelope/elk are not relevant to me. I'd have to carry solid copper rounds for that anyway [where I live].

So, 175gr round for general range use, from 200-450 yards.

I'm liking the low pressure and high power of the Hodgdon Hybrid 100v, but I was wondering if anyone had experience with this?

Also, would this be fine with both 175gr AND 150/160gr, for low pressure but substantial power?

I do NOT want to overpressure the system. I do NOT want the largest fireball possible to follow the bullet out the barrel [my M-N M44 does that JUST fine, thank you very much]. I WOULD like to be able to load to the higher velocity of safe for my rifle, in that bullet weight, and I WOULD like the ability to fiddle with the powder charge to change the velocity by a couple hundred FPS.

AND, lastly, I would like the SAME powder to work well [without nasty pressure spikes] for the lower weight bullets.

So, does H Hybrid 100v seem to fit the bill?

Should I just ignore this new[ish] powder and stick to either H or I 4350?

Ultimately, I'd like no more than two powders to cover my 7x57 [175 and 150 grain] needs WHEN also covering my .300savage [model 99, 46K CUP I've been told], my M1 .308 and my Polish M-N M44 7.62x54R.

I'm thinking Hybrid 100v for Mauser and IMR4895 for the rest.

Does this sound like a good, high performance, and SAFE setup?

LAH · June 8, 2013, 05:33 PM

IMR4895

mwells72774 · June 8, 2013, 06:10 PM

IIRC the model 95's weren't a top notch action. Did a lot of research when I got my 1912 Chilean to make sure it'll handle the same as the 98 action.

I'd keep the CUP on the lower end personally.

LAH · June 8, 2013, 08:26 PM

Quote:

I'd keep the CUP on the lower end personally.

I agree. The IMR4895 does fairly well at lower pressures.

TX Hunter · June 9, 2013, 03:59 PM

I agree with the other posters IMR 4895 would be perfect for Your 7X57 Mauser.

jimbob86 · June 9, 2013, 04:09 PM

I'd try WIN 760, 40.0-44.0gr, OAL 3.060" WLR primer .....

June 6, 2013, 04:46 PM	#1
jmstr Senior Member Join Date: February 24, 2001 Location: San Joaquin Valley, CA Posts: 1,281	7x57 load info, again.... Hello Everyone, I was just trying to get a sense of things before I buy powders that may be useless for me. I have 4 rifles I could reload for, but only one I am asking about right now: my 1895 Chilean Mauser in 7x57. I have about 800 pulled 170-175gr Spitzer bullets pulled from FN-made surplus ammo [made around 1970 in Belgium] that I want to begin loading for. My rifle has the factory barrel and seems to really like this bullet weight. Once I burn up ALL of my surplus ammo and rounds, then I may rebarrel [I have an Adams and Barnett barrel in the wrapper waiting] and move to a lower bullet weight. My primary use for the rifle is plinking/target use. Don't take this the wrong way: I don't hunt. I have nothing against it, but bullet and bullet selection for dropping deer/antelope/elk are not relevant to me. I'd have to carry solid copper rounds for that anyway [where I live]. So, 175gr round for general range use, from 200-450 yards. I'm liking the low pressure and high power of the Hodgdon Hybrid 100v, but I was wondering if anyone had experience with this? Also, would this be fine with both 175gr AND 150/160gr, for low pressure but substantial power? I do NOT want to overpressure the system. I do NOT want the largest fireball possible to follow the bullet out the barrel [my M-N M44 does that JUST fine, thank you very much]. I WOULD like to be able to load to the higher velocity of safe for my rifle, in that bullet weight, and I WOULD like the ability to fiddle with the powder charge to change the velocity by a couple hundred FPS. AND, lastly, I would like the SAME powder to work well [without nasty pressure spikes] for the lower weight bullets. So, does H Hybrid 100v seem to fit the bill? Should I just ignore this new[ish] powder and stick to either H or I 4350? Ultimately, I'd like no more than two powders to cover my 7x57 [175 and 150 grain] needs WHEN also covering my .300savage [model 99, 46K CUP I've been told], my M1 .308 and my Polish M-N M44 7.62x54R. I'm thinking Hybrid 100v for Mauser and IMR4895 for the rest. Does this sound like a good, high performance, and SAFE setup?

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June 8, 2013, 05:33 PM	#2
LAH Senior Member Join Date: March 22, 2002 Location: In The Hardwoods Posts: 1,188	IMR4895

June 8, 2013, 06:10 PM	#3
mwells72774 Senior Member Join Date: May 3, 2011 Posts: 325	IIRC the model 95's weren't a top notch action. Did a lot of research when I got my 1912 Chilean to make sure it'll handle the same as the 98 action. I'd keep the CUP on the lower end personally.

June 9, 2013, 03:59 PM	#5
TX Hunter Senior Member Join Date: February 11, 2010 Location: East Texas USA Posts: 1,805	I agree with the other posters IMR 4895 would be perfect for Your 7X57 Mauser.

June 9, 2013, 04:09 PM	#6
jimbob86 Junior member Join Date: October 4, 2007 Location: All the way to NEBRASKA Posts: 8,722	I'd try WIN 760, 40.0-44.0gr, OAL 3.060" WLR primer .....