Results of H50BMG in a .264 Win. Mag.

Lee in OH

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Joined
Jan 22, 2003
Messages
112
Location
NE Ohio
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.
 

DANTEC

Well-Known Member
Joined
Jul 6, 2002
Messages
390
Location
France
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
 

Lee in OH

Well-Known Member
Joined
Jan 22, 2003
Messages
112
Location
NE Ohio
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.
 

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