I didn't even know calling pronghorns was possible! 

Everything I read about them or see on the hunting shows depicts them as super wary prey that can only be bagged with long range rifle shooting or by ambush at water sources. 

Is it some sort of a mating call that they respond to in teh rutting season?

Thanks for asking. Antelope make about four distinct calls. 

A "snort" call is made and is used to let other bucks that they are around and that this is their territory. Antelope make this snort call sound by blowing through their nose and mouth using their diaphragm. This call sound is used to stop a running or walking antelope buck.

The "snort chuckle" call is a sound made by the bucks when intruder bucks enter their territory, and to let the buck intruders know that he is trespassing on on his turf. The sound starts off with a snort call, followed by 4-5 chuckle sounds. If a buck sees an intruder, even out a mile or so away, he will make this call, informing the intruder to keep out of his territory. Using an antelope decoy while making this snort chuckle to bring in other bucks.  It can also be used to stop and hold bucks for a decent shot.

Antelope make a "hum" call sound. Not only can it be used to stop moving bucks, it also calms them down.

The "wheeze" call sound is made by both sexes. This sound is made when they feel threatened of danger. When other antelope hear this call, all heads are up and they are paying close attention to where the call is coming from, and on the lookout for any possible danger.

I use a combination of snorts/chuckles/hums when walking directly at a buck that are in the wide open, with no cover to conceal any chance of a stalk. While making these call sounds, I have walked up to NUMEROUS antelope bucks to within 10 yards, some Pope & Young Class animals, with the buck holding completely still and not running. It's amazing how well it works on their curious and territorial nature.

Last year I was in south Idaho calling in mule deer. After bringing in over 40 deer to within 50 yards of me, and with two skeptic bystanders watching, I then saw a herd of pronghorn antelope 500 yards away. I simply put on my antelope calling hat and began calling to them, while at the same time walking directly at them in full view. In 10 minutes I was 50 yards from a herd of 7 with one nice buck among them. My two Idaho friends were awe-struck after they saw this. In both instances with the mule deer and pronghorn, I used a "Calls-M-All" game call to bring in both species. The Eastmans Hunting Journal Magazine highly recommends this call after field-trial on both mule deer, pronghorn antelope, and also as a cow elk call, all on one Calls-M-All. You can find this call if you Google search for it under its name. Good luck.

Gamecaller

Hey pronghorn whisperer!  It's not possible to simply walk up to a pronghorn antelope by using a game call to speak antelope.  Sound to me like someone is trying to use this forum as advertisement for their new product.

I'm going to get one of these and try it for real in the fall.  If it works as you say then I'll gladly boast about it here while giving you full credit.  If not, then my previous comment stands.  How does that sound?

WesternHunter, if it works you'll have to change your handle to Dr. Doolittle.  Definitely let us know how it works for you.  Antelope are such goofy critters & so much fun to play with that even if it doesn't work as magically as advertised it'll be a blast to mess around with for a couple of days. 

10-4 WH.  The great thing about antelope hunting is that usually there's another opportunity try it again just around the next hill.  Unless you part of the crowd that thinks that if the goat isn't in the game bag by Sunday morning at the very latest, then the whole trip is a failure - and I don't think you are.  I've spent a week to get a doe; getting multiple stalks in a day, camping where ever the truck happens to be at the end of the day, cell phone off & the radio set to the blue collar comedy station.  No thoughts - no worries.  2 or 3 days sneeking around whith the .44 Blackhawk just cuz it fun (of course no does within 100 yards but a stunning 15"+ paddle pronged boy at 25 - where was he when I messing around with the bow?).  Passed up a couple with the #1 just because an ear was crooked or she was facing left instead of right.  Excuses because I didn't want the fun to end yet.

Personally I don't think antelope are vocal enough except maybe during certain times in the rut that calling will make much of difference.  Then again waving a white flag had worked at times.  Didn't think Obama would win either so what do I know? 

Gamecaller, thanks for the contact info for this call.  Like I said I'll try it out, hopefully this next season, if not, then the following.  Your input is greatly appreciated.  I tend to be a skeptical individual about a lot of things in general and my initial response caused us to start off to a less than ideal start here. Not your fault so don't let it bother you.  Okay now, I'll admit that I complain a lot about new members who join this forum just to selfishly get information and I criticise them when they give nothing in return.  Since you're not like any of those members I shouldn't have been so hard on ya.  Hope it doesn't detract you from joining in on disussions here in the future.  Lastly, sorry to hear about the loss of your wife.  Looking forward to seeing more posts from you.