MY 2 cents worth,,,,,
The bullets mentioned are great, but designed for the 308 so look at the twists recommended, as well as the velocities.
(Bergers usually require a faster twist)
I found three powders to work well with flat nosed as well as with 125 and 150 gr pointed bullets, and those are
Lever gave me the highest velocities
Phone calls can help.
Oh and yes used in 14" contender...