G'Day Fella's,

Your correct Bob F but as so often is the case, an individual only gets half the story or gets their wires crossed and mixed up and out comes another version of the original. I assume this is what has happened with BipBigBore's comment.
Yes the Ruger .375 and .416 cases are Rimless but they have basically the same Rim Diameter as a H&H Belted Magnum. Because of the Larger body diameter (forward of the Rim), the case has a increased capacity (for length), and because of this it can be accommodated in a rifle with a STANDARD LENGTH (or .30-06 length) MAGAZINE.

As to lubricating the your Rifles Locking Lugs, I don't see this being a problem!
I still do this and in 35 + years and at least 100K of Handloaded and Fired centerfire ammo, around a Very Dry and Dusty Australia, this has Never been a problem!
I must say, I believe an awful lot of individuals, read far to much (and believe to much of what they read) and as a result, don't have enough personal experiences to base their theories on!
But we all need to remember one thing.
You paid for your firearms, so feel free to do with them as you please!!!

Just remember another thing, when something breaks (or from neglect), expect to pay $2.00 a Minute anytime you knock on my door!

Merry Christmas To All
From
Hommer