OK, first a little backstory. During my Wyoming trip back in June of 2007, Derek, James and I went out south of Worland into the badlands. There's TONS of BLM land out there, so it is all public access, public use. Some of it is subleased for cattle grazing and all that, but it is still all public land. Anyway, they'd been out there a few times and spotted - and blasted - lots of prairie dogs. When I went out there with them the first time, we had (pardon the pun) a blast. We killed them with just about everything in the arsenal, from a Ruger 10-22 .22 rifle, to several handguns, all the way up to James' .30-06 and Derek's Black Mamba - a wicked Winchester .300 WinMag with a black composite stock. Derek even busted one with his bow! Needless to say, those big guns are punishing to shoot - and a smidge overkill for varmints since those are their elk rifles. On our second trip out, we took his dad's Winchester .243 out there (along with the big guns) and decided to shoot some dogs at long range. And by long range, I mean WAY out there. The shooting started at that particular location at 600 yards, so there were no short shots. We used the laser range finder to verify distances, and James set our group distance record that day that held for almost 2 years. He blasted one with the .243 at 643 yards!
That one trip spawned a new hobby: long range varmint eradication. Back in 2008, Derek purchased a Remington Model 700 SPS Varmint in .22-250 caliber. I can't remember what optics he got for it, but I do know it goes up to 10 power with a mil-dot reticle and it is pretty bad ass. He's also gotten back into reloading ammunition for all of his guns, so he's cooked up a deadly accurate varmint round using Nosler Ballistic Tip Varmint bullets. If you follow the link there to the Nosler page about those bullets, it says they have "explosive expansion." Hehehehe. They ain't lyin'! At short range, rodents have a tendency to...ummm...violently explode. It rocks! But the important thing is that the bullets - and the loads Derek cooked up for them - are extremely accurate out at longer ranges. He custom loaded some rounds for the .243 and also for his new Panther Arms AR-15. Well, back in April sometime, Derek finally bested Jame's distance record with the .22-250. The distance to beat then stood at 695 yards.
So why the long range stuff? Yes, there are some shorter-range dogs to shoot at out there. But with the loads he's cooked up and the way those rifles are dialed in, anything out to 350 yards is a for-sure one-shot kill. Yeah, those are fun...for a while (and especially with the "exploding varmint" bullets)...but the challenge and real fun is when you really start trying to reach out and touch them at longer ranges. Also, most of the shorter-range dog towns along those roads have been shot up pretty heavily, and what dogs that might be left in those are pretty smart. The longer-range towns don't get shot at much because, well, they're out of range of most shooters. And they're stupid! You can take 10 or more shots at a single dog and he still doesn't know what's going on because there's so much time delay between the bullet hitting and the report of the rifle. So in short, the long range stuff is fun because it challenges your skills as a shooter.
So that's sort of the back story.
So finally trip time arrives, and I get into Worland late Friday evening on May 29. Our plan was to visit the killing fields Saturday, and that we did. We made a supplies run first, as we knew we'd likely be out in the badlands most of the day. We stocked up on water and snacks, and we had to get some ammunition for the .22 rifle and the .45 handguns. We also wanted to get some el-cheapo .223 ammo for the AR in case we wanted to rock and roll a little bit.
On our way out, we were talking and strategizing on how and where we'd start, and Derek and James (since they know the country) settled on this one spot that had some shorter ranges so I could get used to the new .243 loads and scope. I hadn't shot centerfire rifles in 2 years, so I was all over that idea - get a little short range practice before trying the longer-range stuff. However, before we got there, we stopped to take a look at one of the longer-range towns and decided to start there because there were quite a few dogs. I chose my weapon (the .243) and they let me do the honors of beginning our day of shooting. I put the gun in the bench rest, got prone, and found a target. Derek ranged it at 405 yards, and told me about where to put the target in the scope's reticle. My first two shots missed, but shot three busted him, and we were off and rolling. I busted another one at about 395 yards (that one was a head shot!), and one more out at 410. At that one location, James killed three with the AR and Derek took one with the .22-250. Shortest kill was 320 yards. Here are some shots of us at this particular location.
After pretty much wiping out that town, we moved down the road to another location. I killed four or five more all at ranges over 350 yards, and Derek and James added to their totals as well. At our third location, I accomplished something that neither of them to that point had done: I got a two-fer! There was a dog laying down on the mound behind one standing up. The standing dog did a bad impression of Superman (well, actually two parts of Superman...) while the one behind him just disappeared in a cloud of red off the back of the mound. It was classic, and provided the three of us with a huge laugh. 
As the day wore on, we decided to move to the ultra-long-range field. This is the one I mentioned in the backstory above where shooting begins at 600 yards. Here are a couple of pics (James on the left, me on the right) sniping targets at this location.
You can see the draw there (that goes through both of our heads), then kind of the flat area, and then the hills. The prairie dog mounds are the spots going up that hill out there (there's more off to the left, too), and those are out between 600 and 750 yards. Crazy!
By this time it was late afternoon, there were some thunderstorms in the vicinity, and the wind had kicked up pretty good. At this particular location, the wind was blowing left to right across our field of fire. But this windage also added to the challenge of shooting at long range. Not only were we having to adjust for ballistic bullet drop, we were also having to factor in the wind's effects on bullet travel. Well, by this time of the day, I was starting to get a little sore. Sore on my chest from laying prone on the ground, sore in the neck from the weird way you have to hold your head to see through the scope when you're laying prone, and sore from recoil. The .243 is pretty light on the recoil, but it was the largest rifle we had with us that day. And I'd taken a couple of shots where I didn't have the rifle seated just right, so the recoil bit me a little bit a couple of times. The soreness made it difficult for me to get my breathing under control, and that's of huge importance when you're taking long shots. Well, I didn't get anything at this location, but Derek and James both did. Derek took one at 675 yards with the .22-250. And James (damnit!) set a new group distance record with the AR: 730 yards!
All in all, we blasted 35 dogs that day. Here are a few shots of Derek and James on the firing line. I'm in the last photo.
Afterwards, we drove into Ten Sleep for supper at the Crazy Woman Cafe because the food's great and they've got Moose Drool! Oh, and their pies are pretty darned good, too.
I'm going to skip ahead here in the trip sequence to talk about our second hunt.
James ended up having to work, so it was just Derek and I out on Saturday the 6th. This hunt turned into a little bit of a challenge. The Worland area had been experiencing unseasonable weather and had gotten a large (for them) amount of rain. The roads on the BLM land are all dirt, and when wet, they turn into grease, making them virtually impassable in certain areas. We tried to get back to the long town and start there, but we couldn't get there because the roads were so slick (and we didn't want to put a bunch of ruts in the road). Plan B took us to new-to-me country out there to a long-range town Derek had visited a few months prior. Shooting at this particular location once again began around the 600 yard mark. We set up and beging shooting. This was the only location we visited that day due to time restraints, so we didn't kill many dogs - maybe 6 or 7 total between us. But I killed two and can now call myself a member of the Six Fifty Club. My first kill of the day happened out at 655 yards, while my second kill happened at 635. Those were my only two hits that day, and Derek killed the rest.
Needless to say my words here don't do the whole experience justice, but we sure had a great time shooting prairie dogs on these trips.