OK, just for grins I did a quick check using QuickLoad and the two 150-grain loads you mention.
.348 MAP = 46,412 PSI
.348, 58 grains IMR 4064 with 150 grain bullet = max 41,669 PSI (well within MAP).
.348AI, 67 grain IMR 4064 with 150 grain bullet = max 55,891 PSI.
This was all fairly rudimentary, since I didn't have bullet info other than weight... so real info might give slightly more accurate results. (And I'm not a whiz with QL, anyway.) I didn't do the same check for the 250-grain bullets, only because I didn't have your powder charge weights.
-Chris
Last edited by Ranger4444; 01/29/23.