Calling cats is truly an act that will test your patience. Never tried mountain lions but called in quite a few bobcats. Sometimes bobcats will completely ignore a call. I had one this year that I could see while deer hunting, gave him a few soft mouse squeaks he sat down looked my way for about 5 minutes then laid down for a snooze for about 30 minutes got up and I gave him a soft dying rabbit call and he looked again and he turned and gave me a cat finger and walked away. Good luck on your quest!