I posted this already Mark and in light of this conversation I 'll repeat it.
This load data is from the RL web site for RL 17
300 WSM 180 gr BTSP Fed Fed 215 2.800 66.0 3082
300 WM 180 gr BTSP Fed Fed 215 3.340 70.5 3074
Don't you find it interesting that the 300 WSM list a higher speed
than the 300 Win Mag yet uses 4.5 grains less powder.
Has not Winchester been saying that all along and yet people
pooh pooh it. I see this with other loads as well.
Does cartridge design matter?
