Have you ever seen someone who "isn't bothered by the recoil" accidentally pull the trigger on an empty chamber?
This is an excellent exercise my friends and I run together. We'll load each other's rifles and once in a while pass an empty chamber.
I have to admit I've been caught flinching on rifles that recoil less than an 06.
My 30-06 is a hunting rifle. I take it out for steel & recyclable whacking at distance and May Fire it 3-4x, each time on a cold barrel, but the bulk of my shooting is done with smaller cartridges with milder recoil & blast.
Thing is, when I point & click that 06 shhitt falls. Hard. No question.
And that's why when I travel that rifle nearly always makes the trip. Confidence in both the rifle & the cartridge.