I recently picked up a pristine T/C Firehawk in .58 cal with scope. The availability for .58 cal bullets around here is slim. I bought a Lee REAL mold (440 grains) and cast a bunch of bullets then pan lubed them. Have not shot it yet, but looking forward to it. I'll update this thread with results when I get it dialed in.
It is most definitely for hunting. I prefer conicals in a muzzleloader. Long story, but true. Years ago, my first muzzleloader was a T/C Thunderhawk .50 cal with 20" barrel. I tried every sabot/powder combination available and it would not consistently group any of them. I switched to conicals and have had 100% consistent accuracy. I know dozens of folks who use sabots and swear by them, but I don't like them. I could get 2 or 3 shots in a decent group, but always had the erroneous flyers even with cleaning the bore between shots. I tried not cleaning between shots and still had flyers.
I have owned 5 different modern inlines and none have done well with sabots, but all have done outstanding with conicals. The .58 Firehawk has a 1 in 38" twist barrel. My Lyman inline has a 1 in 28" and my Remington 700ML had a 1 in 28".
I just prefer conicals and will stick with what works for me.
I will post a range report on the .58 once this stifling heat and humidity subsides (could be September, but hopefully before then)
I have a T/C 58 cal big boar when they came out I had to have one I sold it and found I could not live with one So I found another here on GB but have not shot if for several ++ years . still have some of the TC rounds for it . I bought some cast bullets off GB several years ago . also have some of the sabot loads for it . I plan on picking up a mold at some point to cast my own bullets for it .