My only .20 cal is an Original 45 bought on here. Upon researching pellet options I found there was very little available. While awaiting some FTT'S s by post, I happened upon a selection NOS pellets in a local dealers back shop. Some of them no longer available as far as I can ascertain. Luckily, the 45 shot them all well, especially Daystates and RWS Super H Points. Went back and bought a pile more for a very reasonable price. Very, very few people ever asked him for 20 cal pellets, he said.
If ever I run out of the oldies, I'll switch to FTTs, which go well in the 45 also.