Best Powder For Big 7 ?

Discussion in 'Reloading' started by boltactiondave284, Mar 11, 2014.

  1. boltactiondave284

    boltactiondave284 Member

    Jun 14, 2012
    Someone has said they would do some reloading for me while my reloading order gets completed . My Question is this , what is the best powder to use for the 7 RUM ? We've found some good bullets for it but aren't quite sure about the powder yet . So I know there is alot of knowledge out there so please if you would I could really use your help . Thank you .

    I hope everyone had a wonderful hunting season this year .
  2. WyoElk2Hunt

    WyoElk2Hunt Well-Known Member

    Aug 15, 2009
    H 1000 or IMR7828sc or Retumbo all work good for me H1000 is my favorite.:)
  3. mrultramag

    mrultramag Well-Known Member

    Jun 9, 2005
    For me: IMR 7828, RL25, Retumbo- in that order. RL25 and Retumbo usually will give better velocity but 7828 has been the most consistent performer of accuracy with decent velocity. I haven't tried H1000. And with heavy bullets I wouldn't be scared to try RL33 or RL 50 although I haven't tried either of those. RL22 can be good with light bullets-120 gr. I decided to go with one load after messing around with several for a couple yrs. Will use the remainder of this barrel's life hunting.
  4. Lefty7mmstw

    Lefty7mmstw Well-Known Member

    May 13, 2012
    It's rl22, rl25, and retumbo for me with a 7rum. I've burned the ball 50 cal. powders like 8700 and I 5010 also but there's little data for most of those powders so you have to wing it and break out the rubber undies...:D At present I'm using retumbo with the 171 barnes match in my 7rum but I've also found that rl22 and the 140 sierra shoots well. My old rifle ate rl25 and 140 sierra pills to 1/3 moa.
  5. rooster721

    rooster721 Well-Known Member

    Jan 6, 2012
    7828 or Retumbo in my opinion.. I've used those two more than any & have had exceptional results

    R22 & R25 also do work. Have seen very-low ES with Reloader Powders, just never pursued testing further due to its lack of availability...

    My caliber is a firebird 7mm, but none-the-less, very comparible to RUM
  6. Dosh

    Dosh Well-Known Member

    Aug 6, 2013
    Beat results with Retumbo here.
  7. brentc

    brentc Well-Known Member

    Apr 3, 2009
    If you can get your hands on some rl33 or Retumbo I think you'll be pleased.