Is an adult bison considered dangerous game? Wounded at close range? Believe it! Certainly, not as vengeful as a cape buffalo but it is wise to give it great respect.
Courtesy Wikipedia
Amazingly, It is rare, based on ample evidence, to harvest an adult bison with just 1 or 2 shots to the lungs… even with a powerful big bore rifle.
It is not uncommon to take “at least” 3 lung hits to put down a full grown bull, even from my .375 Ruger or larger rifle. Amazingly, I was able to harvest my buffalo with just 2 shots from my .375 Ruger with 300g Nosler AccuBonds. My guide was thrilled as was the butcher. But being ready to reload is key.
My internal rifle clip only holds three rounds. Not 3 plus one.
Accordingly, I needed extra rounds at the ready to reload, just in case.
I purchased a Tourbon Buttstock ammo holder below. Just $28 dollars.

It looks great, however, I had to work/stretch the leather loops to hold my .375 rounds with 300 grain Nosler AccuBonds. I lubricated the leather with rendered oil from my last years bear. That helped greatly. It now holds 4 rounds.
In addition, I purchased a cartridge belt from Amazon ($11.00), just in case. Why? Easy access to reload can be difficult, cold weather grips the cartridge too firmly in the leather loops, then the cartridge belt with ammo around my waist will be there as a back up.

And I found out too late for this hunt that Alaskan Arms LLC offers a floor plate for two extra rounds in my Ruger Hawkeye African.
https://alaskaarmsllc.com/blue-ruger-extra-round-floor-plate-standard-magnum-calibers/

But at around $300 for the floor plate I am happy with what I have for this hunt.
If in Alaska for Grizzly or Africa for Cape Buffalo, I’ll be sure to get it.
Be Safe! My hunt begins this coming week in South Dakota…
Good Hunting!