Greetings fellow bowhunters!

I just returned from a hunt in Argentina. I didn't go to Argentina to take a Water Buffalo but once there I decided to attempt this big beast. I was pulling 70-pounds on a 28-inch draw with my Jennings Buckmaster Bow. I was shooting 2314's with a 125-grain Thunderheads.

To my surprise, I was a bit underpowered for this big of an animal. While my hunt was successful, I did not get the performance from my arrows that I was expecting.

Any suggestions for taking on this large of an animal? The one I took weighed almost 1500-pounds!