Lube in the case mouth in my opinion is a terrible idea neck tension is what holds the projectile and gives a consistent "start" to ignition anything that can vary that should be avoided. Having said that its unlikely to make any difference in practical hunting terms unless it affects neck tension so badly that the projectiles reset under recoil.
Boat tails seat easily flat base less so but a minute flare or chamfer fixes that.
There are moly coated bullets and moly kits available but Ive not seen any evidence that they shoot any better.
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