Clint, check out YouTube on how to make a coffee can Forge.
A couple of things I picked up is, angle the touch so the flame is swirling inside of the fire chamber. And try using map gas instead of propane. Map gas burns a LOT hotter than propane. That might help some with your current setup. It should get the whole chamber hot for you.
The knives look awesome though! Can't wait to see the finished product!
Patrick