who is running MRL (BAM) Lifters without lifter bore sleeves

My motor is new. I don't think its right.
I am not, I am running norris rockers.
My oil pressure warmed up is 12 to 15 at idle and Not wide open throttle(did not want to do it) usual oil pressure goes up fast when give it good amount out throttle fast not so on mine is 40 psi 3500 to 4000.
Think about taking out the MRL lifters and installing comp 828-16 may need new push rods