The blade in the link is pretty quick for something that large. I've got Jumbo setting in the quench at this time waiting for my ht oven to cool off enough to run a temper cycle. After grinding it before heat treat it lost about 12oz. It was a little over 3 pounds when I started. I haven't looked at it since the quench. I hope there's no curves where I don't want them.
Someone asked about a 20" blade. 18" is huge for a bowie blade. Jumbo is 3 1/2" at the clip.
Scott, I'd love to see what you have. I've got two crowns at this time, one elk and one moose. Neither one are tripping my trigger. There is a reason why the call a moose a moose. If I were to use it I'd need to cut 1/2" to 3/4" out of the middle. Something I have never tried. I do have a chainsaw......