Loading a pistol in three seconds isn't far fetched... that's a move action. Loading a pistol in 0 seconds with no free hands is far fetched.
The rules will probably function fine in practice, but I don't see the firearms you've presented here as viable compared to bows. They don't appear to be major upgrade in effectiveness on any level, and are overall a downgrade. I support giving guns a bigger damage die and letting bows still have their advantages--I did the same thing. I just don't think you went far enough.
Gun kensai would be awesome, however.
Oh, and consider my suppressive fire and taking aim rules (along with the feats that go with them). IMO that stuff is a big part of firefight combat.