Bob,
T/C never made the " Pa Hunter" with a double set trigger........if you saw a gun that looked very similar to it but with Double Set triggers then you were probably looking at a T/C Renegade with 1-48" twist. The Original " Pa Hunter" also had a stepped down barrel from Octagonal to round......the newest models are completely Octagonal. (The older ones are nicer looking!
) They also had slightly longer barrels than their other flintlock models.
The reason they offered the PA Hunter in 1-66" twist was to cater to the PA flintlock hunters who were restricted to shooting roundballs for years........now they have no need to produce a roundball gun since PA loosened the regs on bullet choices so they discontinued it.
Since we all wanted the " Roundball" gun we bought " Pa Hunter" models......hence the reason that we all needed to have double set triggers installed later. They never offered the PA Hunter in that configuration.
If you plan to shoot mostly conical style bullets, the " Renegade" or " Hawken" are probably more suited to your needs........both already have double set triggers and are fine shooting guns.
Also Don' t bother with a .54 caliber unless you plan to shoot roundballs........a .50 with conicals is more than enough for anything youd want to hunt (unless you are after Grizzlies?[
])