What's a "true" big bore - to you?
I am really only truly familiar with one "big-bore". I find it hilarious that so many are afraid of the 375 H&H.
Before I got mine - based on what I'd heard and read, I seriously wondered if I was up to it too. I wondered if I was biting off more than I could chew.
Then I discovered the truth. It recoils about the same as my 12 gauge shotgun with stiff waterfowl loads - loads I shoot all day long when out after ducks and geese.
And - my 375 H&H - weighs only 7 lbs naked - it's a Sako 85.
I'm sure it can bother some people - especially with a poorly fitting rifle. But I'd rather shoot my 375 H&H Sako, than my 30-06 Remington 760 or my Browning A-Bolt 7mm STW any day of the week.
In a well designed rifle - the 375 H&H Magnum feels just like most of my shotgun field loads. It's totally over-rated when it comes to recoil.