Thanks, guys for the information.
Tut, I am 6'5" tall and yes, my left hand is normally in front of the fore-end wood so I am concerned about my leading hand.
Pete, your graph is very informative and I take that to mean that the pressure declines very low after the first 12 inches from the breech end. Still, if the pressure is so low, why is .025 picked out as the appropriate number? Is that what proof houses use? I have heard that .020 is the minimum at 10" from the muzzle. Does it matter is the tubes are chrome lined or not? or if the gun is one made in the 1920's vs 1990's (assume steel in later guns is better).
Know this can be an endless discussion and I don't want it to drag on. Just looking for information.