And what can't an 06 or a 308 do that the average shooter could reasonably expect to accomplish with a 300 WM?
You HAVE to be new at this.
There is NOTHING that roams N America that a 308 can't kill. NOTHING. The statement about "not having enough load" is a dead giveaway to someone with little experience. It's the same BS that newbie motorcycle riders use to justify buying WAY too much bike.
The one thing I can tell you with absolute certainty is that a big stupid magnum will inhibit your development as a shooter and will make learning and developing marksmanship skills WAY harder and WAY slower. But hey, you do you.
I have access to a 338 LM and a 300 NM. They are both friggen cannons. And it never once occurred to me to try to download them to sling expensive high BC match grade bullets downrange at lower velocity. The entire point of a large magnum caliber is to deliver a heavy, high BC projectile at high velocity.
Much like large cc sport bikes, magnum rifle calibers are really best left for shooters with the skills and experience to make use of them. But boys are stupid and tend to think with their balls rather than their brains ... so we get newbies asking how to download the stupid magnum because it hurts them.