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

I just talked to my buddy. He went from a solid body mechanisal lifter to a roller cam with an oil band and his oil pressure stayed the same. He said the band was so close at max lift that he opted to dyno it to make sure he didn’t have an oiling issue. By chance the band in urs isn’t coming up and out by a slim margin. Kim