hey mark, welcome to the forum.
i used to have an image from the jeep service manual of normal oil pressure during start up and warmed up, but i can't seem to find. it. i don't recall the numbers off the top of my head, but yours sound just fine. the oil will get thinner as it heats up, thus the psi drop. are you getting these readings off the stock gauge? if you want true numbers, you can run a mechanical gauge in conjunction with your stock gauge.
SOLD! 83 CJ-7. TBI Small Block Chevy 350/TH350/D300, Scout II Dana 44 front, CJ Dana 44 rear. 4" BDS Lift with 35's. Currently Jeepless.