Results of H50BMG in a .264 Win. Mag.

Discussion in 'Rifles, Bullets, Barrels & Ballistics' started by Lee in OH, Jan 4, 2004.

  1. Lee in OH

    Lee in OH Well-Known Member

    Messages:
    112
    Joined:
    Jan 22, 2003
    Submitted for those of you that may be of interest.

    OK..here's the data....

    140 grain SMK
    RP neck sized brass
    Federal 210M primers
    Temp. - 35 degrees

    65.0 gr. - 2950 fps
    66.0 gr. - 3014 fps
    67.0 gr. - 3030 fps
    68.0 gr. - 3053 fps
    69.0 gr. - 3048 fps
    70.0 gr. - 3091 fps
    71.0 gr. - 3147 fps
    72.0 gr. - 3136 fps
    73.0 gr. - 3169 fps
    74.0 gr. - 3205 fps
    75.0 gr. - 3218 fps
    76.0 gr. - 3242 fps
    77.0 gr. - 3269 fps compressed charge

    I like how the powder gives low increases of velocity between 1 grain charges. That tells me that small deviations in powder charges will have little effect on velocity and should return a nice low standard deviation. Also, the case can be jam packed with the stuff and it won't blow your rifle up and still gives very good velocity. There are other powders that will drive a 140 grain pill faster, but accuracy kills far better than speed.

    Overall, I feel that H50BMG is a very good powder in magnum cases and is very overlooked as a viable powder to use in this class of cartridges.

    You may have noticed that at times greater charges returned lower velocities. It has been my experience that this does happen from time to time, most likely a result of case wear and preparation. My cases are not prepared to BR standards.
     
  2. DANTEC

    DANTEC Well-Known Member

    Messages:
    390
    Joined:
    Jul 6, 2002
    thanks for the imput

    what barrel lenght do you use in your 264 win

    in my 6.5/300 DTC YUMA ( 264 WIN mag long neck )30 inch barrel

    I get 3350 with a 139 Scenar and 5.15 gramme ( 79.5 grain ) case full powder is Nobel SP13 ( commercial name of belgium mage PCL 9520 wwich is slow BMG or fast 20 mm powder ) , fed 210 M primer , case form in 300 WIN MAG .

    good shooting

    DAN TEC
     
  3. Lee in OH

    Lee in OH Well-Known Member

    Messages:
    112
    Joined:
    Jan 22, 2003
    It's a 28" Pac-Nor.

    Seems like that 6.5 300 hums right along. I may try an even slower powder than the 50BMG just for kicks, but I'll probably have to order it special. Heck, I couldn't even get the H50BMG around here, I had to drive an hour and a half to get it.

    Just noticed possibly confusing information. The temp here was 35 farenheit, not -35. The dash was a spacer. Not a good idea in hindsight.

    Did you see an increase in accuracy using the full case of Nobel powder as opposed to a partial case of something else??? That's why I'm experimenting with the really slow stuff.

    thanks.