This suit of armor at Higgins Armory Museum in Worcester MA pretty much sums up why armor suits went out of style in a hurry. Click the pic for a bigger view.
That hole is much bigger than your (well, my) thumb and the dent above it isn’t much smaller. I don’t know if the gun fired two slugs (balls?) at once, but, given the accuracy of gunfire in that era, achieving two hits so close together seems unlikely.
A gut shot was inevitably fatal: peritonitis was not your friend.
Makes you appreciate the armor our guys wear a whole lot more…