Well, that's one way of putting it. That was my experience and I think it's one of TC's biggest design errors.
There's much to like about the design. Very handy to carry, quick to the shoulder, fast on target.. a real chummy little stalker. The simple and totally effective trigger-sear-hammer design is great too... safe, fast to use, nice crisp pull,
BUT the choice of 1 turn in 20" twist rate is an incredible anomaly for a .54 caliber.
Also it was their first inline and employs an overly complex breechpug/nipple setup featuring pressure relief vents yielding a long, unsealed flash channel giving opportunity for inconsistent ignition... fear of litigation resulting from accidents due to overload or barrel obstructrion with it's open breech, I presume.
I suspect that twist was
selected (so to speak) due to developement work done on the Scout Pistol. There seems to have been a strong desire at TC to market an effective muzzleloading handgun for deer/hogs,etc. Perhaps a twist that fast was needed to produce RPM's sufficient to stabilize a heavy (long) conical at a relatively low velocity due to the limited time in the short pipe.
Then, to cut expenses, rather than retool and redevelope for the rifles they just banged-out longer barrels with the same fast twist rate.
Just a guess on my part, but it does explain what is otherwise, IMO, a
total brain-fart by TC.