I have to disagree. I have shot multiple buffalo with the .375 H&H and .458 Lott. I have also been present on a one shot kill with a 9.3x62. All will do the job, but the Lott hits dramatically harder.
You're clearly an experienced Buff hunter, thanks for the info.
I have killed five buffalo myself, and watched my father kill another three. Results and conclusion below:
1. .416 Ruger - 400 grain TSX - Frontal shot from 20 yards, dead after 15 yards - destroyed the heart and lungs - couldn't really see the impact as we were in heavy brush.
2. .450 Rigby - 500 grain TSX - Frontal shot from 110 yards, walked 10 yards then collapsed. The buffalo did have an immediate reaction to the impact of the bullet.
3. .470 NE - Hornady DGX and DGS - I fucked the first shot from 20 yards and hit only one lung. I don't know how many times I shot that bull, but it was a lot. Not a fan of those bullets.
4. .404 Jeffery - 400 grain TSX - My father also fucked the first shot and ended up shooting this bull 7-8 times. I didn't see the reaction of the bull on the first shot.
5. .416 Rigby - 400 Grain TSX - 35 Yard broadside shot. The Bull took one step forward then stumbled backward and died immediately. I will say he didn't seem to react much to the initial impact but was dead within 30 seconds.
6. .450 Rigby - 500 Grain TSX - 65 Yards quartering shot. Broke the front shoulder with the first shot, and second shot in the ass literally took him off of his feet. I've never seen a buffalo react quite like this one, you could tell he was hurt immediately.
7. .416 Rigby - 400 Grain TSX - 80 yards broadside, heart lung shot. Bull ran 50 yards then collapsed dead. Again, no immediate reaction to the first shot, other than he ran off.
Conclusions:
1. Of course, shot placement is king, but you already know that.
2. Hard to argue against those TSX bullets. Every single TSX I have recovered has retained 98-99% of initial bullet weight and opened up like a perfect pedal. I guess some people are concerned about pass throughs. All I can say is these bullets just work.
3. I load that .450 Rigby with 500 grain bullets at 2350 FPS, and it just seems to hit them differently. You can tell they are hurt right off of the bat.