After taking another look at the J. Smith and reading it has rebounding locks, it will not have the half cocking feature. has the patent number been restamped ? It seems they have used an older action, probably a pinfire, with newer steel barrels, I believe the .577 rifle was a pinfire at one time too. when the pinfire became obsolete many good guns were converted to centerfire and it was the best guns which were worth the time and expense.