What do we really know about the transonic zone?

[Don McDowell]

Jim think about this for a moment.
When you guys shoot at Lodi, you shoot the 1000 first. The light is coming directly behind you and lights those targets up. Then you move to 900 and the sun is higher, the temperature is coming up, and the breezes and thermals coming from the temperature increase are playing their cute little games. By the time you get to 800 the light is behind the target, but the target is relatively shaded..

My 17 twist 44 barrel absolutely loves the 434470 bullet, it measures just a tad over 1.35, and comes over the scale at 470ish when cast from 16-1. I'm betting your similar barrel will like that length as well, once you get a powder the rifle thinks it can digest.