The protrusion should be about 55 thou, explain the return spring, mine doesn't have one.  Ledball

added pictures

I've never had any poor strikes with firing pins of .045"-.055" protrusion.

Water Bug:
                    A very nice looking Chicopee CF action!  It looks like you've beefed up the action considerably.  Though usually made for smaller cartridges, I have seen the Chicopee centerfire action enlarged enough to chamber a 30-30, so this would be a good candidate for a 32-40.  I have been working on and off on a Chicopee CF for far too long, and am only just now beginning to have something to show for it.  My rifle's going to be in 22 K-Hornet.
         No two Chicopee's are ever alike, and that's one of the beauties of the design.  Frank DeHaas put out just enough information to get people started, and the rest they get to make up as they go.  On my action I didn't like the set up of the breech plate latch.  Not only does it make the action look like it has two hammers, but it requires a split between the breech block mortises at the back of the receiver.  I machined the breech block mortises as a single piece, and don't want a slot or notch at the top.  Instead I'm making the breech block latch work with a side lever.  I also machined the breech face and the part that holds the firing pin as a single piece of steel.  I'm also going to change the way that the sear/hammer engagement is adjusted.
       The Chicopee CF is the best looking, and is the most popular of the actions that DeHaas wrote about in his book of rifle plans.  They will always be unique as long as the only way to get one is to build it yourself.