Stretch that ammo even more. I stay in tune pretty well at 50-60 rounds a session, maybe twice a week. Work on presentation from the holster 2-3 rounds up close, from the holster and low ready at 7-15 and deliberate, precise fire from 25 yards or farther. Change up when it gets boring but don't stray far from those fundamentals.
Dumping magazines as fast as you can won't get you much except an empty wallet.
“Nine-tenths of tactics are certain, and taught in books: but the irrational tenth is like the kingfisher flashing across the pool, and that is the test of generals. It can only be ensured by instinct, sharpened by thought practicing the stroke so often that at the crisis it is as natural as a reflex.” ~ T. E. Lawrence