My new/used GPH looks like it found a home. Its a 50 cal flinter. The target below was shot at 50 yds using 275 gr Maxihunters and 320 gr Maxiballs with 70 and 80 gr of FFFg.
The 3 shots just below the bull were as high as I could get it before I had to take out the file.
Except for the couple of flyers the elongated hole just left of center is a cumulation of 12 shots with gradual filing. This rifle CAN SHOOT. And it doesn't seem to matter with either bullet or 70 or 80 grs.