Powder question for 7mm Rem Mag

Discussion in 'Reloading' started by pyroducksx3, Feb 21, 2011.

  1. pyroducksx3

    pyroducksx3 Well-Known Member

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    Well Im goin to begin reloading for a 7mm Rem Mag. I have the redding competition 3 piec die set, as well as the competition shell holders, this will be my first time using these sets, always been rcbs equip. before, and I have heard amazing things about them. I also have the bullets down to #1 choice the 140 gr accubonds, #2 160 gr accubonds. So now Im looking at choosing a powder to start with. Im thinking of using ramshots magnum. I am looking for a very temp stable powder that will hopefully give me low ES and still gave great velocity potential. It appears that the RL powders give the best velocity but I have heard they aren't the most temp stable (?) My next choice would be retumbo, then H-1000 as I've heard these are very stable or insensitive maybe a better way to describe it. So just was wondering what peoples expierences are with these or other powder in the 7 Rem mag and if Im going in the right direction. Any advise on these powders , or bullets or componets for that matter, would be greatly appreciated. Thank you
     
  2. merll284

    merll284 Well-Known Member

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    I shoot a 7 Rem Mag with 168 Bergers. I tried Retumbo and it was not consistent with respect to ES. H-1000 gives me single digit ES and is consistent with all types of conditions. H 4831sc worked pretty well too. I would think that these powders would work well with 160 Accubonds also. Hope this helps.

    Andy
     

  3. pyroducksx3

    pyroducksx3 Well-Known Member

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    what kind of velocity are you getting with h-1000? The other question I had with the h-1000 and retumbo was I thought they were better suited to the heavier bullets compared to my 140 but after looking through the manufactures websited they really weren't that far behind the RL numbers, so maybe that is a misconception (?) thank you
     
  4. Grumulkin

    Grumulkin Well-Known Member

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    I use RL-22 with Federal 210M primers and 140 and 160 gr. bullets in my 7mm Rem. Mag. with good results. I don't remember what velocity I got. My shooting has been in Ohio with probably 50 to 90 degree temperatures and, at least in that temperature range, I've had no problem with temperature sensitivity.
     
  5. RockZ

    RockZ Well-Known Member

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    I've had great results with Ramshot Magnum and 160 AB
     
  6. merll284

    merll284 Well-Known Member

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    I get 3020 fps with 69.1 g of H-1000 out of a 26" Lilja and 168 VLD's. Not sure how 160 AB's would work but I would think pretty well.
     
  7. johnnyk

    johnnyk Well-Known Member

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    I have loaded for the 7Mag for approx. 15yrs. In that time I have tried alot of different powders and by far the best accuracy and velocity has been with IMR 4350, IMR 4831 and RL22. I have mainly used the 150gn Ballistic Tip for all of my target, varmint and deer hunting with this round. JohnnyK.
     
  8. coloradohtr

    coloradohtr Member

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    In my 7mm Rem. 160 Accubonds Imr 4350 shot 3/4 in. but the vel. was only 2954. R 17 shot 1 in. one day and 2 1/4 the next time. 7828 shot well but not at the vel. I wanted. R 22 shot under an inch but only 3012 fps. Imr 4831 7/8 inch at 3032 vel. Mag Pro 1/2 in. but only 2928 vel. Retumbo by far was the best vel. 3076 at 1/2 inch. R25 shot a 3/8 group but was slow. IMR 4831 and Retumbo works best for me in a 26 inch barrel. Hope this helps
     
  9. pyroducksx3

    pyroducksx3 Well-Known Member

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    I really appreciate all the input everyone is giving. I guess another question I have is which powders have given you the best ES with balance to the temp insensitivity and best velocity. It appears that the IMR 4831, the H-1000, and retumbo are front runners. I am still very interested in the ramshot magnum powder as well, these are my top interests. Rockz or anyone else who has used ramshot magnum did you find good ES differential in your loads? So if you have used these powders or any else that have been very successful with please post, if you have your ES as well please post those as well, velocity and groups are always good too. I know each powder / bullet combo will be different in each gun but Im hoping I can cut out powders that just havent proven successfull for anyone. thanks
     
  10. HammerB1

    HammerB1 Official LRH Sponsor

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    H-1000 is my choice using the 160 Accubonds. Pretty full case and lowest ES.
     
  11. roninflag

    roninflag Well-Known Member

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    what rifle?? i use h-4831 .
     
  12. pyroducksx3

    pyroducksx3 Well-Known Member

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    The rifle is a fatory chambered rem 700, 26" barrel.
     
  13. 21buck

    21buck Well-Known Member

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    Imr 4350 /62- 63 gr is most consistent for my rifle.
     
  14. CRNA

    CRNA Well-Known Member

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    I am only getting an average of 2917FPS out of 70grs of H-1000 in a 26inch McGowan barrel. How the heck are you guys getting such fast loads?