Thread: Model 7 7mm08 150gn eldx load development

Originally Posted by grandpamac

Greetings @dannyb,
First and most important no it is not safe to use .308W data for the 7mm-08. Pressure will be much higher. I did a quick check on data for AR2206H 40.5 grains with 150 grain HPBT. Using a reduction of 30 or 25 fps per inch of barrel shortening suggests that AR2206H will come up short at 2,500 and 2,535 fps respectively. Lastly using the 30 fps per inch reduction suggests a velocity of 2,520 fps for your 45.5 grain load of AR2209. You are getting about 50 fps more than that. The Hodgdon data pressure is expressed in CUP (copper units of pressure) which suggests that the data was worked up in the 1990's. About 2002 the speed of AR2209 was increased hence your higher velocity and pressure. I reported on this some time back chronographing different lots of AR2209 in my 6.5x55. This would suggest that your additional 50 fps of velocity would put you about 1 grain over book max for the later AR2209. It looks like a good load none the less.
Regards Grandpamac.

Was hoping you'd chime in thanks you have re-enforced what I probably already knew subconsciously....