Have a look at the 458 Win Mag thread and you will understand both are unnecessary with a M70 receiver.
Apparently, Winchester did not get that memo as they are currently offering the M70 in 416 Rem. I feel the big 40's as a group are the best balance for dishing out the appropriate level of punishment at both ends of the stick. That is just my 2c, obviously many draw the line elsewhere. In fact I like the bigger stuff. Liking does not equate to being more effective in my hands.
The OP asked about the sling stud. I hold the stock far enough back that never been a problem for me. As for cosmetic, I dont think that matters. If I had the budget to make changes- I would chop off the brake on the 416 and cut the 375 back to 22". Not that you care what I would do. Well, maybe? You did ask.
