thanks for the comments. 1 i polished every part that could be, using shapeable cratex, including the receiver hammer slots, firing pin holes, hammer spring holes, top of hammer and bottom of sear where the sear seams to bite into the hammer after it trips. the receiver holes and slots looked like they were machined with a hand drill and masonary bits. 2 the rim seats were not too deep, flush with factory ammo. i made firing pins with .055 protrusion, then made pins with .065 protrusion. 3 as i said the hammer pin holes were not round, and with the very light hardware store springs, i was able to see the hammer flopping in its slot, where tool marks were too deep to polish out. 4 i ended up with 4 sets of hammers to compare and study. i used the thickest, and one that gave the most hammer throw. i would have liked to tig welded the hammer sear slots and recut the sears for more hammer throw, but that is way over my skill set. this design has very short hammer throw. the hammer springs i bought were so stout , i could barely cock the gun, and looked like they were just going to break another part. when it misfired, the primers were barely dented. its interesting that the internals of the fulton, fulton special , and hunter special have so many variations in the internal parts. hmmm. installing the ,005 shims on both sides of each hammer, with those stout springs was alot of fun. thanks
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