For me there is almost never a rush on my range time. I pay for a yearly membership. If the sun is setting then I know there is not much time left though I am not in a hurry. (Well exeapt maybe to get out of there, so I can go home to a good meal, and a cold beverage.
) I do not have to worry about this is the only time I get for the month. I know the next few days I will make my way back to the range.
I typicaly spend at least 2 hours at the range. Most times it is even longer than that. I am a casual shooter. I am at the range to have fun. With that mindset my day at the range is always a good day.
As far as how much ammo I shoot depends on what I am shooting at that time. Since I cast lead, and relaod I can burn a lot of ammo on a janitor's pay. Sometimes I shoot fast, a lot of moving, and point shooting. Sometimes it is slow deliberate, and concentrating a small groups. I also have my rifle at the range too. I shoot the handgun for a bit then go shoot the rifle. I take a break for the barrell to cool off, and go shoot the handgun. I have a soda pop and shoot the breeze for a while to kill some time as well.