7 RUM Testing

Discussion in 'Rifles, Bullets, Barrels & Ballistics' started by daveosok, Apr 2, 2004.

  1. daveosok

    daveosok Guest

    Have you given any thought into trying some Berger 180 gr bullets? They work excellent in my stw. I too use H1000 and behind 74.5 grains I am getting 3100 fps and simalar groups, I've managed 2.7 in groups at 500 yards so maybe theyll give you better performance being you have a heck of a lot more case capacity.
    I also switched from fed match primers to wlr as the feds were giving me to much extreme spread.
    Let me know how ya do if you try the bergers because I have been contemplating rechambering my stw to a rum. One note though I have a 34 in barrel so my figures will reflect fps differences.
    Dave
     
  2. bblaine2k

    bblaine2k Well-Known Member

    Messages:
    61
    Joined:
    Jun 25, 2003
    Well, it has been quite some time since I was here last. But I've managed to do some loading and shooting of my 7 RUM.

    It's in the standard Sendero Stainless Fluted package and topped with Sightron SII series 6-24X mil-dot scope in Leupold Mounts.

    [​IMG]

    As for my most accurate load that I've found for it, this is what works for me.

    Load Name: 7RUMAccuracyLoad
    Bullet Mfg: Sierra
    Bullet Type: HPBT MK
    Bullet Caliber: .284
    Bullet Weight: 168
    Ballistic Coeff: 0.636
    Powder Mfg: Hodgdons
    Powder Type: H-1000
    Powder Weight: 88.200
    Powder Lot Number: ?
    Primer Mfg: Federal
    Primer Size: LR Magnum
    Primer Type: Gold Medal Match
    Primer Lot Number: ?
    Case Mfg: Remington
    Case Length: 2.838
    Case # Times Loaded: 1
    Cartridge OAL: 3.650
    Comparator OAL: 0.000
    Av. Group size: 0.250
    Av. Group Velocity: 3037
    Cartridge Mfg Date: ?
    Cartridge Lot Number: ?
    Moly Coated: No
    Crimped: No

    Though it does nearly one-holers at 100 yards, this is what I've found it to do at 300. Still gotta work its way out further. This is under 2 inches at 300 yards and I'm happy thus far. This is my group of a scanned target so the quality isn't that great. I gotta remember to keep bring that digital camera!!!

    [​IMG]

    Anyhow, I hope this helps out some of the guys interested in this cartridge. I'll let you know how things progress.
     

  3. bmetcalf91

    bmetcalf91 New Member

    Messages:
    1
    Joined:
    Jan 9, 2009
    Thanks, for the 7 rum load data. I'm in the process of building a 7 rum on a rem action. The barrel is a Sheilen 26" 1 in 9 twist. I am planing on shooting the Berger 180 VLDs. Most the guys around here with 7 rum's are shooting 180's over H-1000. I will definatly give it a try and I was also looking at Retumbo as it seems to yeild higher velocities but the accuracy has to be there. Have you tried Retumbo? If so could you share your results?


    Thanks, can't wait to get out and start testing loads.
     
  4. Forrest Ebert

    Forrest Ebert Well-Known Member

    Messages:
    190
    Joined:
    Apr 22, 2008
    I have had great success using IMR 7828 and 189 grain Cauterucio bullets.
    I use 87 grains of 7828,Fed 215m primer and Remington cases.COAL is 3.625 3 shot groups measure .456 haven't chronoed yet. These are shot out of a 26"barrel on a Remington 700 action.

    gun)
     
  5. boltactiondave284

    boltactiondave284 Member

    Messages:
    21
    Joined:
    Jun 14, 2012
    I did and you were 100 % spot on . How long is your barrel on your stw and do you think a 30 inch barrel would increase accuracy ? I wish you a Safe and Wonderful Hunting Season .