The B78 was not equipped w/ a Badger barrel. They were the 1st re-issue of the legendary M1885 Browning clones. IIRC correctly, they were only available for about a year or two,--approx 1979-80--then dropped from the catalogue. The B78 was fabricated by Miroku in Japan.
The only BP caliber was a .45-2.1" (AKA .45-70), & it was carbine w/ a crescent butt plate. Based on personal experience, it kicked like a mule w/ its light weight & crescent butt. The trigger also left something to be desired & there was no tang to mount a tang sight. had the rifle for about 3 yrs then sold it. No aftermarket trigger was available for it.
Every now & then, they show up on the various on-line auctions.
The last run of the Browning M1885 clones-- the BPCR, model-- was equipped w/ a Badger barrel & had an integral tang to mount a tang sight. IIRC, the Traditional Hunter series also had a tang, but I don't know as to the barrel maker(s). Like the B78, these rifles--cept for the barrels on the BPCR-- were fabricated by Miroku.
The BPCR was designed to be a competitive BPCR rifle & availalbe in .40-65 & .45-2.1" . There also was a 36" heavy-barreled (Badger) Creedmoor mod. availalbe in .45-2.4" (AKA .45-90). Only about 350 or so of these were made.
Like the B79, no aftermarket trigger are available ; however, there is a MO. gunsmith--Lee Shaver-- who really fiine tunes the trigger. he has done several of mine.