I might be hurting the sensibility or belief of a few, but for me
375 for Buff is like 243 or 6.5 for Elk!
Works if all planets are aligned, but in fact not appropriate!
Yes a 375 can work but why would you risk a dangerous situation for you, the PH and the crew and loosing an wounded animal still having to pay a trophy fee?
why would you not take that extra security of a bigger caliber?
Rationally I only see 2 main reasons:
-inability to manage or fear of recoil for big bores or
-financial reason for not buying a bigger bore rifle.
Both are good reasons for a compromise for using a 375.
And it is of course better to be accurate wiht a 375 than unreliable with e.g., a 500.
I have hunted enough wildboars with my 9.3x62, witness how a 150lbs beast can survive such a caliber that I would never go and hunt a buffalo wiht a 9,3x62!
When I decided to go to Africa, I bought a CZ 458 Lott for DG and a CZ 375HH for big PG.
My experience is limited to only one buff with my CZ in 458 Lott, one shot, dropped 50 yards away.
At 165 yrds the TBBC 300gr of the 375 went through the chest of my Eland and stopped behind the skin on the other side. He run 150yards. I was happy not having used a smaller caliber.
I grew up hunting Chamois and Red Stag in the European Alps with 8x68s (180gr), then moved to 300WSM and 300WM (165gr and 180gr). I Used 338 Lapua (250gr) for Ibex and Atila wildboar. 300WSM for moose, caribou and black Bear (187gr). , 9,3x62 (250gr) for Wildboars. 458Lott for DG, 375 for Wildboar Atila and African PG.
My point is that I do not like to have to put a caveat or constraint "Assuming a well placed shot, then caliber xxx is good enough"
It shoul be only the minimum obvious: "a first good shot" so there is a safer room for small error from "well place" to "good" because animal might move last minute, shooting position might be not stable enough, there might be leafs, grass, trees, human error, etc.
Better safer than sorry. I like the safety net of a the right caliber and bullet.
But I accept other might have other criteria