I agree, the vertical movement of the transfer bar is "lacking", especially if one removes the "creep" in the trigger mechanism. Sorting through a "bin" full of transfer bars can result in a few "longer than normal" specimens .......
I wondered about that many years ago. However, I do this; Take your NM and make sure it's empty. Next, cock the hammer. Look at the amount of firing pin coverage by the transfer bar. usually from 35% to 60% from the ones I have. Next, hold the hammer back and pull the trigger and watch the transfer bar. It rises up more when the trigger is pulled.
I just checked my 2 Lipsey's 44's and my Accusport 45 convertable. All 3 did exactly this same thing.
Basically, don't worry as there is more contact than you think.
I have removed ALL the creep from this trigger. It is crazy nice. So when you have it cocked the transfer bar covers maybe 40% of the back of the firing pin. But when the trigger breaks it hasn't moved much (maybe 41% coverage). If I continue to pull the trigger all the way back (after it has went off) it will cover the entire pin. I have never fired the gun (brand new) and may not get a chance to fire it for another week or two. I'm not really worried, but I've been wrong before. Thanks for all the replies.