My .177/10.34s that ive been running at ft matches are semi-old stock, purchased prior to about 2022.
Due to stocking up on good ones when I could, the only pellets I've bought in the last few years have been....
JSB .20s, in both weights. I've still never gotten a bad batch of .20 JSB.
.22/28.55 Grands. Theyre somewhat competitive at the 100 yard paper games. Got me into the finals at a recent smallish EBR-style match.
.22/20.83. These beat the absolute socks off the 18.13s, in the BC category.
I bought some of the JTS stuff in .22 a while back (something in the 20grain range if i remember correctly) and decided after about 50 shots that they weren't better than JSB for accuracy. Trying to scrub that crapping hard "lead" out of the barrel cemented my decision to buy no more of THAT mess. ("Lead" got some quotes cuz JTS is using some sort of alloy, comparable to the old Crosman Premiers.....using hard lead projectiles can almost ruin a barrel for going back to shooting a quality lead pellet lime JSB. I exaggerate of course, the hard alloys don't ruin a barrel, tbey just makes it a royal pain in the ass to get out, and that barrel won't shoot good until it is removed.)
(I take that back. I found 5 tins of FX labeled .22/25.4 Monster RDs at Trenier a few months ago an snatched em up for my long range/high power ft gun that favors them. )