Comp Cams 828-16 Solid Roller Lifters

Did you read the description on the Comp site? It has conflicting information. It says NO oil holes. If there's no oil hole, they cannot be pressure fed, can they? Pretty kornfrooshing.
All I’ve ever seen is the following blurb within the details of the Endure-X roller lifters:

“and most applications include EDM oil injection technology that guarantees the bearing assembly receives a constant flow of oil”

so yeah, definitely “phone first”!