I feel like I should comment on this given my experience with a shooting. (Read the thread in GD if you haven't.)
A GOOD Sheriffs department or PD will not care what you use, as long as the shooting was justified.
The only time I was questioned in any way, shape, or form, regarding the weapon used in my situation, was when I originally went to the Sheriffs Department after the event. The Chief of Detectives asked me about the weapon. I gave him everything. Make, model, type of ammo used (Including weight of the round.), how many rounds I had fired, how many rounds were still in the gun, reconfirmed max capacity of the weapon, etc...
After that, not a word was said until I had to get it back. A gun is a gun, and as long as the shooting is justified, you shouldn't* have a problem.
*Everybody might have a different experience depending on location and quality of the department dealing with the case.