180 vs 150 ,30-06....velocity difference

[farmerbythelake]

I will be surprised if they do shoot the same. I am trying to get them as close as possible so I can practice with loads that don't cost $46.00 a box retail, they are still gonna cost $1.00 a pop when I reload. But I will site in and practice with the high dolar loads in October right before the big Elk hunt in Colorado. Any body know how units 42,421,and 41 are for Bull Elk Oct 23 - 31st?