The load would depend on what you buy. If you buy a tradional style Hawken that has a slow twist barrel 1/48" or slower then a 490 patched round ball with about 85gr of 2F will make a nice hunting load that will be good out to a 100 yards.
The newer Hawkens like those by TC were designed to shoot the maxi ball that is a bullet style projectile. The load for these should be in the 80 to 90gr 2F range.
I have also shot RB out of the newer Hawkens with good results. If you use RB go to any fabric store and buy a yard of 100% cotton pillow ticking. This usually is 15 to 18 thou. thick and can not be beat for patch material.
Anybody that tells you that you have to shoot a 100 plus grains to get a good hunting or target load should spend more time at the range or witness what a 50 cal RB can do to a deer at 100 yards or closer. I have yet to retrive a 50 cal ball out of a deer that had not flattened out to the size of a quater when it went in and tore that size hole all the way through to the outher side, breaking bones on it's way.
I also use spit as a lube. All you need is a little to help that patched RB down the bore. I stopped using bore lube as a patch lube when I found that at the end of my hunting day when I would unload my gun that sometimes the load would go off kind of slow and sounded like a boom instead of a crack. I found that the lube was contaminating my powder charge.
I am not syaing that they all will do that but the one that I was using did. I have never had that problem with a spit patch.
Anyway good luck, I know you will enjoy shooting BP.