338rum 300 smk

ZSteinle · #1 01-12-2010, 12:27 PM

How fast are you pushing 300 smk's out of a 30 inch tube with the 338 RUM?

acloco · #2 01-12-2010, 12:43 PM

2950 with Retumbo out of a 32" Rock Creek barrel. There is a little more speed left, but kept it there for safety (just in case!).

ZSteinle · #3 01-12-2010, 11:03 PM

2950! that's screamin! whats the point of an edge if your getting 2950 from a 32" tube? That would put you at at least 2800 or better with a 30". Just planning my 338 build and looking for ideas, any suggestions let me know

acloco · #4 01-13-2010, 03:35 AM

Agreed. Go with the RUM. The money you save on the RUM brass versus the Lapua mag will easily buy you a LOT of the 300 gr SMK's. Brass life is close or the same for the two calibers.

Chas1 · #5 01-13-2010, 04:34 AM

2950 fps...I'd check my chrono. What altitude are you getting that at and what's your load. A 338 Edge 300 smk running a 30 inch tube 2865 and the Edge uses about 5% more powder 6-7 grains.

300R · #6 01-13-2010, 05:34 AM

I shoot a lapua,but a mate has a 338 rum 30"barrel and 2800 fps is a very hot load in his rifle.

Varmint · #7 01-17-2010, 05:10 PM

I too shoot a 338rum with a 300 gr. at 2975 fps with 93 grs. of Retumbo, out of a 30" Pac Nor three grove barrel.Never had any trouble being to hot at 1000 ft. or 90 degree weather.Easy to extract from chamber. I can tell you I shoot a 180 gr. BT at 3600 fps with no trouble ,and a 225 gr at 3300 fps. I use 4831 SC with a 180 and 225 gr. SST with H-1000. Tim