I Imagine they are both 1 in 14 twists.
55 and short 60 grain bullets are probably the upper limit.
There are some heavier bullets that will stabilize due to their blunt shape. the 63 Sierra smp and 70 speer SP are two that will work. The 63 Sierra is super accurate and a killing machine, well worth a try
Enjoy your new rifles and try to keep shrapnel from beating you out of them.
