Gus,
I checked several rifles, some flint, some percussion.
All but the last have a single plain trigger, no set.
The last is a Dickert with a double set trigger. It'll fire from the forward trigger unset, and I checked it both ways.
Now, I've had all these guns apart and know the lock internals are strong and in good condition, but none the less, caught the hammer in my hand without letting it just fall!
I calibrated the high quality 5 dollar fish scale with a 1 pound bag of sugar
1st. A Simon Miller, was flint, but now percussion, Golcher lock, 2 lbs.
2nd. Nicolas Hawk swivel breech. Hawk percussion lock. 3 lbs.
3rd. Nicolas Hawk rifle. was flint, now percussion, Golcher lock. 5 lbs.
4th. A Lehigh flint rifle. No name lock but looks like a Ketland. 2 lbs.
5th. Another Lehigh with a wood patchbox. Flint Ketland lock. 2 lbs.
6th. George Cunkle Percussion. Drepperd lock. 8 lbs.
7th. New England flint Fowler. No name lock that looks like a Ketland. 3 lbs.
8th. Jacob Dickert flint. Double set triggers. No name lock that looks like a Ketland. Unset, 4lbs. Set 1/2 lbs.
All worked fine and nothing broke! Maybe I ought to take em out shootin'!
John