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Looking for a powder recommendation 7mm R mag.

 
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  #1  
Old 12-10-2009, 10:07 PM
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Looking for a powder recommendation 7mm R mag.

A-Bolt, 26" barrel, bullet will be Remington's 150gr Cor-Lokt. I'd like to be able to get an honest 3000fps with good accuracy using these bullets, Remington 9-1/2 primers, Winchester brass. I've never done any 7 Mag loads so I have no idea what powder might be a good starting point for my needs. That there are so many powders offered can be confusing, and since components are so difficult to find locally, getting lucky with the first powder tried would really be nice! I recently did some .308's, first powder I tried did great, 47gr of IMR 4064, 150 Cor-Lokts, CCI primers, Black Hills brass will do approx. 3/4" from my Savage 16. Can I even hope to get so lucky twice?
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Old 12-10-2009, 10:13 PM
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Re: Looking for a powder recommendation 7mm R mag.

List of go to powders for 7 rem mag:

H4831 or H4831sc
H 4350
Reloder 22

Alot of people love RL 22 and it gives great velocity, I think it burns dirty so i use H4831. 28" barrel, 168 VLD, 215m primers, 3050 fps

You can also substitue IMR 4831 or IMR 4350 BUT THIS DOSE NOT MEAN THE SAME LOAD! THey have similar numbers, but different burn rates.
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Old 12-10-2009, 11:21 PM
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Re: Looking for a powder recommendation 7mm R mag.

140gr with 68gr RL22 gives me 3300 FPS with great accuracy.
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Old 12-10-2009, 11:27 PM
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Re: Looking for a powder recommendation 7mm R mag.

demented,
Long time fan and reloader of the 7Mag. She is not a finicky round to reload for most of the time. I have used a couple of powders that have really stood out as solid performers. I first started using IMR4350 and got great accuracy, but them switched to IMR4831 and it shot just as accurate. Now it may have been all in my mind but IMR4831 seems to kick a little more than IMR4350, even though the velocities in the book were similar.
Then I discovered RL22 and fell in love with that stuff. It shot great and provided all the accuracy and velocity a feller needed. My load during that cycle was the 150gn Ballistic Tip ahead of 67.0gn of RL22 and a BR2 primer. Velocity averaged 3150fps in the Sendero that I shot that in.
I traded that rifle for another 7mag and it likes IMR4350 better than RL22, so that is where I'm at now. My load is still the 150gn BT ahead of 63.5gn of IMR4350 with a 9.5M primer. I'm getting, on average, 3240fps but this load is 1/2 gn above the max in the Nosler #6 manual. Be careful and work up to it. JohnnyK.
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Old 12-11-2009, 12:11 AM
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Re: Looking for a powder recommendation 7mm R mag.

Thanks to all.... It may just be me, luck, what have you, but over the years I've had great results with IMR powders in everything from .243-.308-.270-30-06. Since this will be my first sojurn into magnums, I admit being at a loss and to be honest, a bit intimidated by the usual necessity of going beyond the manuals to get a 7mm to perform as it was intended, not as a sheep in wolfs clothing. Until now I've used Federals Premium with 160 Nolser Partitions (bought ten boxes on clearance at Wally World five or six years ago for 12!!! bux per!) Like that'll ever happen again! Anyhow, these now run close to $60 per box after taxes, both too expensive and a bit of overkill for our 200 pound class deer. Sorta figgered on doing a load that'll do well enough to 400 yards to get me by. My choice of Remington 150 Cor-Lokts was due to there not being anything else locally available, hopefully these will offer enough accuracy and performance to make them suitable for their intended task. (400 yds-max)
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  #6  
Old 12-11-2009, 12:43 AM
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Join Date: Apr 2009
Location: Eastern Wheat Field near Bennett, CO
Posts: 543
Re: Looking for a powder recommendation 7mm R mag.

Powder for 7mm RM? That's easy.
Anything around RL 22 burn speed will work reliably.
Unfortunately RL 22 requires different loadings for Colorado summer ( 80*F)
and winter ( 0*F). Just a little temperature sensitive.

A couple of my current favorites:
Win 780 Supreme is the all time favorite. When you can get it.
71+ gr. of Ramshot Magnum will provide outstanding velocity,
68 gr. Accurate MagPro works well too. Works so well that I just picked
up 2 more pounds of it. These like F 210 and WLR primers.

I have also noticed how hard it is to find powder these days.
It has occurred to me that I might want to hold on to a 7mm Remmy mag.
If only because it's so easy to feed.


JM .02
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  #7  
Old 12-11-2009, 01:10 AM
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Join Date: Nov 2009
Posts: 55
Re: Looking for a powder recommendation 7mm R mag.

I live in Arkansas so temperature extremes are normal here, too. So I'll need to be careful shooting a cold weather developed load in our 100 degree summers...Darn, yet another thing to worry about! I begin to think loading magnums is part voodoo, part art, part luck and lastly a bit of skill. In what order of magnitude I'm not quite sure!
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