Your initial post does not mention rifle, bolt or double - or caliber, but you do question if a culling belt is "over-the-top, over kill, or uncomfortable.
I can speak only from my personal experience and preference. My first consideration for ammo is access, second is amount. My go-to rifle for dangerous game is a double and I use a culling belt. Watch a video of someone shooting and performing a quick reload on a double; break - both spent rounds eject, use your thumb and two fingers to draw two live rounds from the culling belt, roll your hand palm up as you bring the open rifle and hand together and drop the two rounds into the barrels, snap the rifle shut as you raise it back to your shoulder and you're back in the fight.
Having experienced one of those situations described by Altitude Sickness, turning and reaching for your back-up 458 Lott, only to watch it grow legs and disappear into the brush at a high rate of speed - is definitely an "oh-shit" moment.
When you go head to head with dangerous game you are putting yourself, your PH, the trackers, everyone around you, in harm's way. That is not the time to be more concerned with fashion over function. Not having tusks doesn't make an elephant less of a threat, in fact, it could be quite the opposite.
To address your question of uncomfortable; a culling belt does not use the loops on your pants, it goes on over, and for me, above my pants. I only wear it when I'm actively on the hunt. Remember access? I can rotate the belt to make my ammo more accessible if need be.
The folding wallets work great, I primarily use them to store extra ammo and attach them to belts on my day bag.
I do use the sliding pouches which have the bullets exposed for my 458 and 375. I put those on my regular belt, and if I'm using either the 458 or 375 for back up, I'll put one on the culling belt.
I have two of the Murray fold-over wallets which I will never use, I bought them when I was where you are now, you can have them if you want to try them out. They are for 375, I do know what caliber you might need. Send me your address and I'll send them to you.
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