Our rancher buddy was nice enough to park his semi with doubles hooked up at the most infested area of the ranch. This gives the ultimate shooting position with the added elevation, especially later in the season when the alfalfa is anywhere up to 8"-10" high, allowing for what we call "head & shoulders" shooting, as all you can see of the little buggers is that much of them when they stand up for a look-about. Very challenging shooting, especially around the 300 yard mark.
Here's our setup the first day overlooking the alfalfa pivot:
Gary (Captqc) was shooting his Cooper Phoenix in 204, I was using "Wicked Wanda", my new Cooper Montana Varminter, also in 204. One side of the shooting setup overlooked alfalfa, the other side a hillside about 200 yards away. The top of the hill was just under 300 yards, and both sides of the truck was literally infested with Beldings Ground Squirrels, the alfalfa ranchers worst enemy.
Here's my view of the hillside from my bench. Squirrels were everywhere on that hillside, especially in all the dirt areas where they had mounds or worn the grass away. It was grand shooting.
Some Cooper porn....my Cooper MTV 204 on the bench. I was shooting 32 SBK's over RL10X at 4,035 fps:
My drop chart in MOA for the 32gr SBK RL10X load that seems to work so well in this rifle (.198" best so far):
A "squirrels eye view" from the hillside looking back at the semi after we had torn down for the day:
Here's one of the rats I shot at the very top of the hillside at his hole at 288 yards with the 32 SBK. Note the amount of fat on the little guy. No wonder the ranchers hate these critters:
Landry, the son of a very dear friend joined us for some fun also with his M700 22-250. New to the sport, he's already hooked:
Okay, now the wild part. This late in the year, the weather is usually pretty good around these parts. We fully expected cold, but shootable conditions the next day. Well, we got cold alright, in the form of a ligitimate blizzard raging the next morning when we awoke. The wind was 40 mph, and it raged for six hours Here's a look out the front door of the Rat Hilton:
My truck parked outside....not late May spring rat shooting weather
:
The very next day Mother Nature smiled upon us, and we got ideal shooting conditons; sunny, warm and dry with blue skies and squirrels running about everywhere on the ranch. Captcq and I got right with the program with our Coopers again:
This shoot will go down in the books for diverse weather conditions. It was great to have a wood stove during the blizzard with flatscreen TV, DVD "guy movies" and our 204's waiting for the sun the next day for more fun with Skippy and his pals. No complaints from us for sure. I'm sure once again though that Skippy's kin that are left see it quite otherwise.
Dang that's a lotta blood & guts!! No wonder the Farmer's practically adopt you fellas!! 
I have been trying Ramshot X-Terminator and it looks very good at the first experiment with it.
500 squirrels a DAY! 