I continue to be amazed that people are actually concerned with expansion in the .475 Linebaugh. Folks, ithe bullet is "expanded" when it leaves the end of the muzzle. If you want to try the 325 grain bullet, or have tried it and like the accuracy; by all means use it. I find the lighter weight bullets over heavy loads tend to make the .475 recoil more like the .454 Casull.
I shot a cow elk with the 400 grain Speer Gold Dot and got 5.5' of penetration. The bullet broke the left femur and was recovered under the hide of the right shoulder. I seriously doubt you will run across a deer that will stop your bullet regardless of shot placement.
Penetration, not expansion, is the name of the game when hunting with a revolver. Remember, two holes are better than one when you are putiting meat on the ground.