I usually go twice a week - for a couple hours at a time in the evening.
I will often take more than one gun and sometimes different calibers / but for any given caliber, I usually plan on shooting 2 boxes per range session / then switch guns. Most of the drills or courses of fire I run through for practice are based on 50 rounds / and I like to run each drill twice.
I probably average 8 - 12 boxes a week.
I'm not trying to break your heart - but a lot of the progressive presses will easily turn out 1,000 rounds an hour. As you really get into shooting handguns - using a loader giving you only 60 or 70 cartridges an hour kind of takes the fun out of reloading / especially if you get into shooting some of the high capacity handguns in 9mm ( with 14 to 19 rounds per mag, my word). I look forward to the time I spend in the shop - reloading, working on a wood project, whatever ....but I don't want to go back to loading 70 rounds an hour. Xmas is coming up / I'm seeing quite a few good used loaders out there on the market too....might be time to add another loader to the mix / keep the single stage for rifle or something with a lower volume. I like the Dillon loaders ( like the 650 ) but RCBS, Hornady, etc are all making good progressive machines these days for under $ 500. I think the Dillon square deal is $ 340 brand new / and its a pretty good loader for the money.