Seems I hit a sore spot.
I still stand by what I said.
I used to shoot at most of the indoor ranges in the metro when I lived in the metro. BPR was the main one. I started up there before Roger had the no mag dump/rapid shooting rule and he started that for a reason. Had the same at Bills robbinsdale and armored fire/bills north. Had that experience in New Ulm as well back when. Pretty much all indoor ranges have issues with it.
Outdoors, if you have your own bay, go for whatever floats your boat. Then you can present and fire, etc.
Hate to say it, but train like you plan is a BS thing to say about indoor range shooting. You are not moving, you are not taking cover, and you are not presenting the weapon.
Shooting a SBR with comp is showing off at an indoor range, it's saying look at me and my unusual gun. Any NFA item is at a public indoor range. What functional goal are you getting doing that in a public setting? A suppressor is kind of saying the same, at least until they become common, but at least you are not disturbing others.
The .223 is not a sub 100 yard rifle, nor is the AR platform a short distance item. I have shot enough 3-400 yard prairie dogs to know better. It's been a while, but the M16 I was issued was zeroed at 200 yards according to the sights... Maybe police doctrine and training is that way, and I will admit 3 gun shooting is often done at short distance, but that is not because the rifle was designed for that, and frankly if you can hit a target at 100, it's easy to hit one at 10.
Honestly, what rifle work worth doing at a indoor range is easily done with a .22 rimfire rifle. Pistol, that is much more practical indoor, but still, I think folks would have issues If I showed up and shot my comped 9x25 race gun there. It was obnoxious enough that I was asked (not told) to not shoot it at BPR during the winter matches.
Shooting for function testing may be sensible wherever is closest, but somehow I would not want to plunk down $15 or whatever to shoot 1-5 shots then leave. Also, most outdoor ranges are open in the winter. Maybe not as comfy, but I have shot at SCAPSA, MGF, Oakdale, Faribault, and key cities in the winter.
I can understand the desire to get out and shoot.
I am not saying it should be banned.
I am still saying shooting indoors at short distances with a comped centerfire rifle around other people is boorish behavior. Some uncomped guns are horrible too, such as SBRs and true magnum rifles. You can get plenty of trigger time with rimfire rifles and standard pistols without making everyone else uncomfortable. For the true case where you have no other gun, it would be forgivable, but frankly I don't know anyone who has only one gun and that is a comped AR, even those who have boating accidents regularly.