Thanks for the experienced feedback gentlemen. My 30-06 loaded with 150's is on the faster end of the spectrum, so it feels similar to the factory 180's for me.
I will give him some slower lighter 30-06 loads for summer shooting, until he loses his flinch response, before we go to the trouble of switching to the 270.
Thanks!
Load up some 110's for him to practice with. Then step up to 150's for hunting. You don't have to load them hot, to kill deer...Just sayin..