Yes, I know what my gun can do. Todd@ Southern Xpress Custom Rifles built it and he is one of the best rifle builders as many on here can attest to, especially the new muzzle loaders. He shot his Coues Whitetail a couple of years ago with a 375 caliber muzzle loader at roughly 568 yards, if I remember right. His friend videoed the shot and it was super clean. Deer was standing for a moment after, then just rolled down the hill.
SunDevil is probably right about how long it may take, but I've been very fortunate so far. I'll just have to plan as though I'm getting drawn and start learning all I can. Last year was my first Deer hunt, and it was muzzle loader. Scored/measured 173 and looks very nice according to everyone who has seen it. Maybe I'll be very fortunate again. If not, still doesn't hurt to learn.