If your gonna answer your own question
I just built 2 300win mags with heavy barrels 1" and .975" dia.
One is a Rem action the other is a Savage same thumbhole stock on both
same 6-24x burris on each they will both put as many rounds into a 5/8" hole as you would
care to shoot 10-15rds groups, gets kinda warm after that
I have a Rem 700 factory sporter that will put 3-4rnds in the same size hole but after that
it opens up probably because its already smokin hot.
So I guess it depends on how many in a row you need to put downrange.
Not sure what caliber your thinking about but a 13-14lb 300Win mag is quite easy to shoot off
the bench we usually put 50rds each session down the tube and you never feel like you have.
Oops re-read post 223. Have one of those too, usually need to clean it before I notice heat affecting
accuracy. It has shot 50rd MOA groups just to see if it could.