Don't paint all indoor ranges with a broad brush just because you don't like the one you go to. There are some great indoor ranges, as well as not so great. There are also some great shooters, as there are some that aren't so great, and I'm not talking about target accuracy. I'm talking about common courtesy, good safety practices, etc.
The same goes for reloaded ammunition. There is great reloaded ammunition, and there is some that shouldn't be fired. The question is, which kind is coming through the door of the private range? If I was the operator/owner of an indoor range, I would be very selective on who I let bring their reloaded ammunition into my range, and to tell you the truth, their attitude would have a direct impact on my decision, one way or the other.
Luckily, I'm not in that position, and I don't shoot on indoor ranges. I have in the past, and I was less than comfortable with the shooters in the lanes on both sides both times I was there. It was with a friend who is a member of an indoor range in another state, but I won't be shooting there on my next visit....... It was less the range, and more the clientele, that made it uncomfortable.