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Powder for 7mm Rem Mag

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  #1  
Unread 09-08-2012, 08:35 AM
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Powder for 7mm Rem Mag

OK guys, I'm trying to work up loads for my 7mm Rem Mag. I tried H-1000, RL-22, IMR-4350, and IMR 7828. I tried these powders from low to high trying to find my guns max load with each and to check velocities. This gun will be used for hunting, so I want to go with the higher velocities but still retain acuracy. It doesn't pay to shoot a 7mm Rem Mag if it's loaded down to .270 velocities in my opinion. I hoped to get good velocities with the H-1000, but it came up a few hundred fps short compared to the others. The IMR-4350, IMR-7828, and RL-22 were close to the same velocity. I threw out the RL-22 because of its temp instability, so I am left with IMR-4350 and IMR-7828. Which one of these 2 powders do yall recommend for the best accuracy? I would like to use the IMR-4350 because it has a slight edge in velocity, but if IMR-7828 groups better, I will use that. Now before everyone says to try both, I am just looking for experience as to which one to start with.
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  •   #2  
    Unread 09-08-2012, 08:39 AM
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    Join Date: Jul 2011
    Location: Gillette, Wy
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    Re: Powder for 7mm Rem Mag

    IMR4831 is what I use. Pushes 162's at 3050fps with exceptional accuracy. I found a load with H4831SC that's about as good just uses more powder.

    Haven't tried the powders you have so it might not be much help to you.
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      #3  
    Unread 09-08-2012, 08:56 AM
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    Join Date: Feb 2008
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    Re: Powder for 7mm Rem Mag

    What bullet weight are you using?
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      #4  
    Unread 09-08-2012, 09:04 AM
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    Re: Powder for 7mm Rem Mag

    Quote:
    Originally Posted by runshort View Post
    What bullet weight are you using?

    Oh I forgot, I'm using 150g Nosler Partition with Winchester brass and Federal 215's.
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      #5  
    Unread 09-08-2012, 09:22 AM
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    Join Date: Apr 2012
    Location: The cold part of Montana
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    Re: Powder for 7mm Rem Mag

    62.5gr IMR 4350 CCI250, I used to use this load with the Nosler BT. It drives tacks, I don't see any reason that a Partition wouldn't shoot very well with it either.

    One powder doesn't necessarily group better than another, it's your recipe, Combo of bullet, powder, primer, cases, seating depth all working together

    RL22 is one of the best powders I ever used in my 7mag, I never had any issues at all regardless of temp. H1000 likes a heavier bullet than 150s, 160gr -190gr it pretty well out paces most others with the major exception being Retumbo, Ramshot magnum, and supreme 780 also look pretty good on paper but I've yet to try them. If your worried about temp stability the Hodgdon Extreme powders are the ticket, H4831 being a very very good powder for most bullet weights.
    __________________
    Keep in mind the animals we shoot for food and display are not bullet proof. Contrary to popular belief, they bleed and die just like they did a hundred years ago. Being competent with a given rifle is far more important than impressive ballistics and poor shootability. High velocity misses never put a steak in the freezer.

    Joe
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      #6  
    Unread 09-08-2012, 10:37 AM
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    Join Date: Oct 2006
    Location: Oregon City, OR
    Posts: 507
    Re: Powder for 7mm Rem Mag

    I have Found H4831 or H4350 to work great in mine. I prefer h4831. I push a 168 Berger at 3050.

    RL 22 seems to push things faster but I found it to be real dirty in less you ran it at higher pressures. Then I ran into temp sensetitivty.
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      #7  
    Unread 09-08-2012, 10:59 AM
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    Join Date: Sep 2012
    Posts: 5
    Re: Powder for 7mm Rem Mag

    Quote:
    Originally Posted by Robinhood493 View Post
    OK guys, I'm trying to work up loads for my 7mm Rem Mag. I tried H-1000, RL-22, IMR-4350, and IMR 7828. I tried these powders from low to high trying to find my guns max load with each and to check velocities. This gun will be used for hunting, so I want to go with the higher velocities but still retain acuracy. It doesn't pay to shoot a 7mm Rem Mag if it's loaded down to .270 velocities in my opinion. I hoped to get good velocities with the H-1000, but it came up a few hundred fps short compared to the others. The IMR-4350, IMR-7828, and RL-22 were close to the same velocity. I threw out the RL-22 because of its temp instability, so I am left with IMR-4350 and IMR-7828. Which one of these 2 powders do yall recommend for the best accuracy? I would like to use the IMR-4350 because it has a slight edge in velocity, but if IMR-7828 groups better, I will use that. Now before everyone says to try both, I am just looking for experience as to which one to start with.
    reloader 25
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