Colorado yearly publishes a Draw Results report. The Pronghorn one is here:
https://cpw.state.co.us/thingstodo/Pages/Statistics-Pronghorn.aspx
You might start by downloading the Draw Recap report. You should also download the Big Game Hunting Guide, which tells you you how to decode the hunt codes. For instance, AF001O1M would be Antelope (A), Female (F), GMU 001, Public Land Season 1 (O1) Muzzleloader (M). This can help you immediately rule out hunt codes you aren't interested in, such as Archery (AF003O1A for example) or private-land only (AF003P5R).
Once you know your criteria you can ignore most of the pages of the Draw Recap report and just focus on units and codes that would work for you. Next, in the Recap report, go through each page (it's long but since you can skip most, it doesn't take that long) and for any hunt codes that "might work" for you, take note of the Quota and the % Drawn Out At. The quota changes year to year, but usually it won't go from 500 to 10, and it never goes from 5 to 500. So if there are only 5 tags for a zone (AF001O1M) that's going to be a hard draw without points. That same page says 4 tags went to those who had 1 point and 1 tag went to somebody with 3 points. If you have no points that's going to be a hard zone to draw.
In the screen shot above you can see 100% of the tags drawn required at least 1 residential preference point to draw that tag.
Make a short list of zones with reasonable quotas that show in 2019, at least, people were drawing either with 0 points (you have a chance) or that went via the "leftover list" (no points were required for anybody - the draw went by with quota left over unused). For instance AF013O1A (Antelope, Female, GMU 013, Season 1 Archery) had a quota of 10 which sounds tight but there was only ONE applicant, so 9 tags were left over and you could have gotten one:
Now prepare to be discouraged. Because what you'll find is that unlike doing this same process with deer or elk, you're going to have a VERY short list here. And then you go to the Colorado Interactive Hunting Atlas (
https://ndismaps.nrel.colostate.edu/index.html?app=HuntingAtlas) or better still, Basemap or OnX, and overlay three critical layers: pronghorn species data, the GMU boundaries, and the land ownership to find public land. What you'll probably find is there's very little overlap between public land, tags available for the GMUs that contain them, and actual pronghorn existence.
It can be discouraging but there are a few things that make it "not quite as bad" (if not actually great):
1. Don't forget that the hunt code has a GMU number but often applies to more than one actual GMU. The Big Game Hunting Guide will tell you for example that if you hold AF001O1M you can hunt both GMU 1 AND 201. And if you hold AM001O1M you can hunt 1, 201, and 2. Make sure you look at all the zones a tag actually applies to when you do your research. There isn't always much rhyme or reason to it, some tags are just for a single zone or maybe two, and some cover half a dozen. It's tedious, but you have to look up each one.
2. You can and might get lucky. I read the recap reports every year and often see zones with tags available that never get fully drawn out. And they aren't the same ones every year. Sometimes people just don't apply. You could get lucky. If you don't draw your first choice, you automatically get a preference point. You don't need 20 points to hunt Colorado, unless you're literally after the biggest/best/most fantastic creature still running around. Lots more more zones become available with just a single preference point, or maybe two. Unless you're a trophy hunter (in which case I don't think I'd go to Colorado, for pronghorn anyway) you actually have a VERY good chance of hunting every other year if you pick realistic zones, and especially if you alternate good/"at least I got out of the house" targets every other year. You can force this by listing A-P-999-99-P as your first choice. This makes sure you get a preference point, while still letting you participate in the draw at a lower chance of success in your second->fourth choice slots. If you choose high percentage-chance tags for those slots, you have a good chance of hunting every year while drawing a "good zone" every other.
3. Make sure to pay attention to the "weird" tags, especially Ranching for Wildlife which is confusing for a lot of people. RFW tags let you hunt private land and there's more of it registered every year. These take a lot of research (and driving around) but might be an option for a second-choice tag if you just want to get out of the house.