I'll second that, punch a hole in the nail,it reduces pressure, and helps ease the pain a bit.
Back 20 years ago I used to frame and finish, used a nice short estwing 20oz leathergrip hammer for finish work, and a good estwing waffleface 28oz hammer for framing, never failed, everytime I switched hammers I'd hit myself, quit framing so I always used the same hammer.
Ken.