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

funny you should mention oiling thru the pushrods... My plan was to run oil thru pushrods and shaft oiling my Harlan Sharps but restrict the passages to the head down to .060.... I am running Crower extreme duty Hippo solid rollers that will oil the pushrods.
Anyhow , when I called Smith Bros. to order they recommended against the oil thru pushrods citing that my spring pressure of 600# open could force the oil back down the pushrod and burn the tips/cups. They said they have had several customers fry their pushrods....
Does that make sense ?

I ordered the non oilers but now am starting to rethink that decision.