With as savage when you tight the nut you increasing the head space. You also are using a different part of the thread when doing it. The real difference with a nut you are tightening a stud .
With as shoulder it barrel is a bolt
All race motors the good one use studs .
That reason alone is why I use the nut.
On my target actions I have larger od lug along witha larger nut That allows me to tighten above the threads on the out side of the action . Larry
Larry, I agree 100% with your first 2 sentences. I assume you are talking about Savage's. The style Savage nut, the common one with square 'lugs' on the outside have the same OD measurement, it is the ID that changes with large or small shank barrels.
I am lost when you say "That allows me to tighten above the threads on the out side of the action".?
In your analogy of racing engines. Yes, studs if you are talking about how a head is held on. However the state of the art in connecting rods is 'cracked rods' secured with bolts. And of course rod bolts are able to be measured by bolt stretch which is the most accurate way to measure proper tightness. I do not see many similarities between a bolt action rifle and an engine. Connecting rod bolts are constantly put under ever changing horrific conditions.