I got a 1903 32 cal. ACP from my dad. It was in pieces so I assembled it (tough to do until you figure out that the hammer won't go in unless you squeeze the trigger and grip safety real hard).
I put a couple rounds in the magazine, brought it out back and when I chambered a round it fired. Scared the ---- out of me. So -- I tried it again and the same thing happened if I was squeezing the grip. Tried it once more with my hand clear of the grip and it was fine. Now I would have thought the sear and hammer weren't engaging but --- I unloaded it and tried and the hammer fired.
Tried this a bunch of times and the hammer always fired. The firing pin spring seems strong --- I can move it forward (when the receiver is off) but it has good resistance. Any thoughts on why it is doing this?