I don't find it necessary to dry fire or decock my 41 to disassemble the pistol, just lock the slide back and pull the trigger guard downward and the barrel will remove. It is not advisable to do much dry fire with any rimfire as over time the practice can cause damage to the chamber in the form of peening. If you desire to keep the hammer down on an empty chamber then a spent case can be inserted into the chamber to keep any possible damage from occuring.
You can dry fire the model 41 without worrying about any damage. As a matter of fact, dry firing is the recommended way to practice and learn trigger control.
If you are interested in dry firing a 41 you might want to check out the Bullseye
forums-there are numerous recomendations there including plastic hammer blocks, dummy rounds etc. I have seen too many 41 chambers dinged
by dry firing.