7mm rem mag

Discussion in 'Reloading' started by feralcat, Jun 1, 2010.

  1. feralcat

    feralcat New Member

    Messages:
    3
    Joined:
    May 29, 2010
    I'm using a handload I have found excellent but have no idea how fast it's travelling.(no access to a chrony). If anyone using the same load can give me the speed in fps, would be appreciated.

    Rifle Tikka T3 lite L/H 7mm Rem Mag
    Load Rem brass, CCI LRM primer, 65.5 gns RE-19, 140gn Nosler accubond.
    OAL 3.8"

    I know these are going hard and fast and they hit game like hammers. Accuracy is .7" @100mtr.

    Thanks in advance.
     
  2. jeffro

    jeffro Well-Known Member

    Messages:
    192
    Joined:
    Nov 15, 2006
    Every rifle is different. Shoot it out at distance, and then compair it to JBM and see what speed matches to your drop. Use your ALT, TEMP, BAR, HUM.
     

  3. Fitch

    Fitch Well-Known Member

    Messages:
    478
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    Aug 5, 2009
    Checking the drop, as suggested, is the way to go if you can't get access to a chronograph. That said, I modeled your rifle in QuickLoad using Rem brass H2O capacity as it comes out of my Ruger, your 24.375" barrel, and get an estimated 3052 fps. You might start with this and then correct it with measured drop data at 500 yards.

    FWIW: I have a couple of 7mm Magnums - I like the cartridge a lot, so I ran a load map for your rifle in QuickLoad. All the following powders have the potential for more muzzle velocity. I've no clue how they'd group but the predicted MV is higher. From fastest predicted MV to slowest, they are:

    Reloader-25
    Ramshot Magnum (Big Boy)
    Viht N560
    IMR7828 & IMR7828SSC
    Viht N570
    AccurateMAGPRO
    Reloader-22
    Reloader-19
    IMR4350

    I was surprised by how little velocity spread there is - IMR4350 is only 80 fps slower than RL25. While there are folks that would do extreme things to gain 80 fps, for me group size is what counts.

    I've had good accuracy results with both the 160g Accubond (1/2" in a Ruger 77MK-II) and the 150g TTSX (.2" in a Savage BVSS) pushed by RL25. I have some 180g Berger VLD's loaded with Retumbo to try as well. I'd sure like to try the 168g Berger VLD hunting bullet but can't find any for sale anywhere on the planet.

    Fitch
     
  4. 7 loader

    7 loader Well-Known Member

    Messages:
    256
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    Oct 9, 2009
    I agree with Fitch. The muz velosity is great but grouping to me is better. But call Nosler the # is on their site they should give a close figure.gun)
     
  5. feralcat

    feralcat New Member

    Messages:
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    May 29, 2010
    Thanks. I use the Nosler reloading manual now, they list same load to go over 3300fps. Accuracy is good so I will continue using it.