Thread: 300 win mag

Originally Posted by Blair

Sweet I’m going to use h1000 which is ar2217 by a different name.
From what I can find online, looking like load somewhere between 72-77 gr, would that be about right? Obviously watching for pressure.
What speed are you getting with 75.5?

Hi Blair,

I am still working on my loads for 300WM and haven't been happy with 208 ELDM in my rifle yet. It shoots to a Km fine, but the groups are shoddy - infact Federal blue box has been better! I have been using 2217, Fed magnum primers and federal brass. Have just bedded and stabiiised the stock, with marginal improvement.

My B14 has a very long throat so my OAL for my loads has been 3.62" (0.005" off the lands I think), and 76.5gr powder doing a mild 2860fps. around 77gr was tipping 3000fps from memory and was unnecessarily hot, although no real pressure signs.

I'm going to do another set but use recommended ADI book OAL of 3.42". It will mean a jump of around 250 thou, but if factory shoots well so far pack then I'll try the eldms too (although they do reportedly like to be closer to the lands).

If I cant get ELDM to shoot off this next work up then I'll sell my 3 boxes of them and get something less temperamental.

As mentioned earlier, SST is a pill I have had great success with in my 308. Clover leaf no matter how much I neglect my bush pig...