I would say the main benefit to more weight with a mono .. within some limits .. would be improving the BC to reduce wind deflection and possibly retain more velocity at very long range. I would probably stick with the 120 grain version with the 6.5 Creedmoor. I would certainly try the 140 in a 6.5x.300 Weatherby or, if it was twisted tight enough, a .264.

All my opinion without shooting them, however ...

Tom

Anyone who thinks there's two sides to everything hasn't met a M�bius strip.

Here be dragons ...