Ron, from memory, here's what some have used (approximately):
Monty Browning - 90#
Denny Sturgis - 90#
Dale Karch - 70#
Don Thomas - 78#
Don's mate Rosie - 78#
Corey Mattson - 84#
Rick McGowan - 85#
Bill Baker - 68#
Ed Schlief - 66#
Rik Hinton - 75#
John Teitzel - 68#
There are many more who have successfully hunted buffalo. The most common seem to be mid-70s to low-80s.
One US hunter got some bad press in our Sporting Shooter magazine, because even though he got a one arrow kill, the buffalo made three kilometres before expiring; they found it the next day. He used a 65# bow, but messed up by using a 3-blade head; sounds like a one-lung hit, and it was on an immature bull.
Similarly, my immature bull was put down with one arrow from my 63# Martin Hunter; the arrow was too light, but I was using a 2-blade head. Still, I was lucky that I destroyed the heart, and the buffalo only ran about 60 yards before dropping. Penetration-wise, if I hadn't hit the heart, it would've only been a single-lung hit.
The moral of the story is to err on the side of heaviness, both with arrow weight and draw weight, and make sure you use a 2-blade head.
Cheers, and I hope you nail one someday! Ben
![](http://i96.photobucket.com/albums/l164/b_kleinig/4.jpg)