I'm one of those that stops priming once the drill bogs down and I get a solid reading from the temporary pressure gauge. Why go to all the trouble to slather up the bearings with expensive assembly lube if you're going to stand there and hose it all to the bottom of the pan? If you have done your assembly correctly the top end will have enough lube already; and once pressure is up, all the galleys are full of oil.
It's never a good idea to let the smoke out of the drill

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