To continue with this thread, the military rifles of the USA and England had hefty locks with a half cock in a big tumbler that a man with a strong grip like my old friend George Wiley* had would be the one of a few that could easily defeat it.The Swiss lock had a long fall from fully cocked but the preload on the mainspring was high and lock time was instant.These rifles were target rifles with military benefit.
*George Wiley was a mechanic and did battery rebuilding and sold them at much reduced prices to those who could not afford a new one,
I have seen him stand and talk to a customer while holding a long Exide battery by one of the posts with ordinary pliers.There was a shop next to the garage owned by a man that looked like Groucho Marx and he had a habit of hard squeezing during a handshake,George showed him that was a bad idea.Going back to locks,the very high class English/Irish locks seen on match rifles and hunting guns were not robust like the military types and the pictures Lynton McKenzie showed me were jobs for lock makers and he said there were 4 he knew of in the USA and they were himself,Bill Roberts,Bob Roller and I am sorry I can't remember the last one.I did repair one for the captain of the German International team,it was a tumbler that had a failure of the shank that holds the hammer.The lock was a top of the line Brazier
from a Whitworth match rifle.I got $70 for that job +return Air Mail.One of the Germans told me that as far as was known,there were no machinists or gunsmiths that would accept that job.
Bob Roller