Three weeks ago, I had a rat coming out in broad daylight under the bird feeder, that I somehow managed to miss from 15 yards away. Two weeks ago, I had a rat on the bait station well-lit and centered, and somehow didn't hit him. If I wasn't prepared to declare an all-out supernatural visitation of the rodent kind, I was definitely at the point where I had completely lost all confidence in my shooting. I did target sessions where I would concentrate on nailing my hold consistently from shot-to-shot, only to see promising groups on the paper get ruined by a few flyers. I really wondered if there was some internal issue with the rifle, maybe it had a failing mainspring, maybe there was a faulty seal somewhere - maybe it was in desperate need of a tune. Well, I ended up going where I should have gone from the start - back to B.B. Pelletier's blog on Pyramyd Air. And there was ol' B.B. telling me that many accuracy issues with air guns are the result of a dirty bore. Of course! It was a total V8 moment.

Bonk! Clean the barrel you idiot
The truth is, I had been afraid to clean the bore of my rifle since I had no experience cleaning guns (not even a firearm), and since every tutorial I have ever read about cleaning an air rifle was filled with warnings, cautions, and BOLD LETTER DON'TS. The last thing I wanted to do was be the jackass that ruined a fine rifle because he didn't know what the hell he was doing with a cleaning rod. But I had, a couple years ago, purchased from the Yellow Forum Classifieds a Beeman Basic Cleaning Kit (no longer for sale) which included a cleaning rod, cleaning patches, bore cleaner/degreaser, and .20 cleaning pellets. So I had this kit in my closet, but had never used it out of a combination of not seeming to need it, and downright fear.
So a few nights ago, I decided to sack up, studied the instructions, and proceeded with the cleaning. I soaked a cleaning patch in the degreaser, tentatively pushed it through the bore from the breach, and repeated. Having never cleaned a gun, I have nothing to compare it to, but the black muck that came out on the patches was substantial. I ran many dry patches through until the black residue turned to a rusty brown, then faded almost completely. I then went out back and fired a few quick-cleaning felt pellets through. The directions in the kit said to fire 2-3 at a time to provide extra resistance (since they are so light) and keep the piston from slamming too fast and potentially damaging the gun. It was all I could do to force two of the things into the breech, so I went with that. When I squeezed the trigger, I was greeted with a very loud bang that set my ears ringing. I can't say with any certainty, but I wonder if the pellets, being so light, went supersonic. That would account for the loud bang. But I also didn't know if there was some sort of dieseling going on due to the cleaning fluid, or heaven knows what else. Of course, a lack of knowledge didn't stop me from promptly loading up two more cleaning pellets and repeating the exact same ear-ringing discharge. Then I put the gun away, hoping I hadn't ruined the gun or caused the neighbors to call the police.

The next day (yesterday), I took the gun out to see if anything was to come of all my trouble. I placed lemons on the bait station (about 18 yards away) to stand in for rats. I also went back to the Crow Magnums (my favorite, and once-upon-a-time-accurate-in-this-gun pellets) and again worked on nailing my hold consistently. I was encouraged with the results (there were no misses!) though I had to spend a little time getting the zero reset for the weight of the CMs. By the end, I was satisfied and started feeling a little trace of the old confidence return.
Last night at sunset, I baited the station on the fence with more sun butter and Cheerios (that combo is like rat-nip). I set up at the patio table and pointed a red-tinted flashlight at the target. At about 8:00, I saw that same big roof rat I missed a couple weeks ago come ambling up and watched him take the first Cheerio. I cocked and loaded my rifle, but he was gone by the time I got it in position to shoot. I had about a 20-minute wait until he came back again, but this time I was ready. I brought the rifle back up, replicated my hold from the earlier target session, and put the cross-hair on his head. He was eating off the very front of the bait station, and I was seeing him almost directly head-on. Through the scope I could see his two eyes glowing red, reflecting the light of my torch. I squeezed the trigger and thought I heard the thunk of impact. I heard a subtle squealing and then a thump as the rat fell off the fence and landed in the plants underneath.
I took a flashlight along with my gripper/reaching tool out to the scene and there that fat bugger lay, as dead as can be. I was pleased to see that the accuracy was spot on: the pellet had gone in exactly at his left eye and not exited. He was a big one - fat and 16 inches from stem to stern. Bagged and tagged and into the trash.
I don't want to jinx my success, but I can only hope that the cleaning was the missing element all this time. Only time and more shooting will tell. But I am really happy with last night's results. It feels like I finally got my gun back.