I was there less than an hour with my MP15-22 which I purchased in December. 4 mags.
I went through about 1.25 boxes of Federal Bulk pack in less than an hour. Honestly I lost track of time I was having so much fun.
Barrel was hot by the end of the session. The floor looked like it had brass confetti.
I had a total of 2 incidents. One FTF which is likely the ammo and one weird double feed type of jam which took a while to clear..it had one round kinda stuck in the magazine with another misfed into the chamber...
All in all a very satisfactory range visit and quite enamored with this little rifle.
PS: another bonus was that since its all decked out with a facog and magpul stuff..looks just like a real AR..so I was getting lots of compliments at the range and who doesn't like that right?