Changing limbs on my Strother Wrath due to shoulder issues. Went from 70 max to 60 max. A little advice on arrow selection would be helpful. Set-up is going to 55-60pounds @ 29inch draw. Vaportrail limdriver,spotthog tommyhogg,went with magnus stingers as far as heads.
I run 57lb at 30" draw PSE Vendetta. 29" Beman ICS Hunter 340s with blazers and 125 grain heads. Shoot and tunes very well. At the draw length you are talking you are very much on the line between 400 and 340 much like me. Rule of thumb is always err to the side of the stiffer arrow. Good luck with it.
I run a PSE Stinger with a 400 grain Beman ICS hunter with 100 grain Muzzy broadhead. I'm always right on point. I just shot a doe 6 inches behind the head from about 50 yds out.