At audio frequencies the 'skin effect' doesn't have much of an effect, especially with a conductor diameter as small as that of RG316, so the current density is virtually constant across the diameter of the centre conductor. That is, virtually all of the current flows through the steel core and very, very little of it flows in the silver plate and copper cladding.
Barry
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If the OP buys some, he can try it a few ways and stick with the config he likes best. I used my ears and I'm happy with the results. YMMV.