For me it has to be my FAC FX Wildcat mk2, it's just so light and accurate. Perfect for squirrel bashing.
One shot, one kill. Not luck, just skill.
Theres one gun that I trust, which tends to follow me to the cabin, and that is my old well worn full length .177 Supersport.
It wears a 4x28 Weaver rimfire scope and a home made, home blued steel muzzle weight.
This gun was my first british springer- and after I realized how good it is, it has probably been the reason I spend too much money on airguns.
The Supersport (I have several, but this one is "The" Supersport) is set up with a mystery spring that came from a friend, and with a delrin tophat and guide it performs really nice at about 11fpe. It had become a bit buzzy lately, so it probably need a larger guide if the spring is starting to open up from a lot of shooting- this is probably the spring and gun I have shot the most over the years.
I have never had any issues with this gun, it just keeps shooting at the same spot, and the accuracy is good to great as long as it gets a quality pellet.
It prefers 7,9 or 8,4grs JSBs, but shoots good with a lot of other pellets too.
My most used has been the rapid. 20 fac for the last 6 months
Falcon Prairie CS.22 Huntsmans .20 Theoben .20 & .22 FAC
My artemis p15 in 177 with pardnv008. And that's in front of 3 rapids and a daystate. My Mk1 HW80 is in bits being cleaned and the stock is being sanded and refurbed.
So the Real answer to the original question would be "detail sander" I suppose
This weeks plonker is my m1 Superstar in.177.
Best of the bunch is the Nick G TX200
Pete