7mm Remington mag with n570 180 bergers

ARlife4me

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Apr 18, 2018
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Texas
No drop tube the oal is 3.43 I have 2 guns that I run n570 a 300 rum that I shoot 90 grains with 225 eldm’s and a 264 win mag with 156 Berger’s that likes 63.4 grains. I just thought I would try n570 to see what it would do. I need to go check the es and sd and see what it does
I have the bthp and eldm in 225 for 300wm, but the heaviest I have for 264 is 150smk. I'm hoping to go a mile with them (150smk). IF, ql is close to velocity I could be in the 3,300+fps range with the smk? Drop isn't the issue, but drift (if not calm enough) might make me in no man's land.
 

southpa

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Mar 5, 2013
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Idaho
Little revival from my testing with 180 hybrids and tumbo (i know its a thread on 570 but thought id add findings). I was getting well over 3000fps with charges from 70.5-72. 72 grains of retumbo was 3250. Personally I am astonished with this speed. Anyone see that out of their 7rm? It's a SAAMI 26"....
 

WeiserBucks

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Aug 16, 2016
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Little revival from my testing with 180 hybrids and tumbo (i know its a thread on 570 but thought id add findings). I was getting well over 3000fps with charges from 70.5-72. 72 grains of retumbo was 3250. Personally I am astonished with this speed. Anyone see that out of their 7rm? It's a SAAMI 26"....
You need a new chronograph and better life insurance.
 

southpa

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Mar 5, 2013
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Idaho
The chrono speeds were verified to 950 with a kill at 800 last year....maybe this year it's not working accurately...🤷‍♂️
 

TopPin

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Feb 9, 2019
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125
Location
Montana
I have a 7 mag Remington 700 it’s a newer rr action 26 inch barrel it’s not a gun I hunt with anyway I thought I would try n570 for fun with 180 berger vld. I shot in increments of .4 and worked up to 74 grains the node was at 72.8 at 2980 fps shot pretty well at 100 3/4 inch I haven’t ran it past my labradar yet to check es and sd 72.8 is about at the max I can put in the case before it becomes compressed I’m not getting a sticky bolt lift but it’s close I haven’t seen to much info on this combo has anyone played around with n570 in a 7mag?
I know that primers are hard to come by, but I think you will find running either Winchester Magnum Primers, and or Fed 215 a better suited primer. N570 usually runs a compressed load due to the powder being about the size of Lincoln Logs. Personally found much better velocity, ES, and SD running a hotter primer. Just an opinion.
 

Shane Lindsey

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Jul 13, 2010
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2,506
OP or others with the charge weights over 70+ with these. What is your brass life like? Have you loaded them several times yet? Primer pockets?

I topped out at 68gr with accuracy and a 177gr mono in Peterson brass and 67gr with a 190 LRHT. Throat extended to load long.

I have found a velocity/pressure swings with different lots of N570.
 
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