The Range/gun shop I am a member of, has plenty of Ammo for range use. I don't think the Shop sells any 9mm over the counter, I believe they reserve it all for the range. Same with .22LR.
They are packed Wednesday (when they start staying open late) through Sunday. I was in there a few weeks ago looking at use .22LR rifles and there was at least 20 ppl waiting to get a lane (10 lanes indoor).
Another range I visited last week and scored a UMC 9mm mega pack also had a range attached and on a thursday had 5 people waiting (not sure how many lanes, never shot there) and they had plenty of ammo for the range use.
I plan on hitting the range on my weekday off when we start working Saturdays at work next month.
I was hitting the range almost every weekend and one night after work for Bowling pin shoot league but been saving the pennys for Trap league.