Quote:
"Model 21 Winchester simplified the boxlock even further, doing away with the V springs, using coils instead. The V springs in the boxlock are A- hard to make and fit, and B- they drag on the top of their slot when firing and cocking."
A 1915 patent by Stevens covers coil spring strikers and was used on models into the mid 30s.
And the short-lived Baker sidelock hammerless doubles had spring loaded firing pins that rebounded the firing pin back from the primer pocket after firing- I will concede that of all the American boxlock doubles, as saith both the late Mikey McIntosh and Steve (Model 21's came out in 1941) Bodio-- the AH Fox guns had the best sculpted frame lines--and like the M21, piano wire coil springs--