I actually really like the thunderbolts in my bolt guns.
Shortly after I got my CMMG 22LR conversion bolt to test in a few different AR's of mine, I thought I'd do some comprehensive testing with several of them and my other 22LR's.
I tested the thunderbolts, wildcats, golden bullets, and the bulk winchester 222,333,555 stuff.
My personal results
Marlin 880SQ, heavy barrel bolt action with scope (most accurate 22 I have ever owned)
Thunderbolts....tackdriver. No issues ever. Dime sized 10 shot groups at 50yds. Have used this ammo in this gun for 10 years+
Wildcats. No firing issue, but group grows to quarter or half dollar size
Bulk winchester 555 - no firing issues, and pretty accurate too. Not much different than thunderbolts, but I think thunderbolts have a slight edge accuracy wise in this gun.
Golden bullets - cant hit squat. Baseball-softball size groups. But again, no issues firing.
Old mossberg bolt action open sights
Pretty much same results as above. No firing issues. Winchester bulk and thunderbolts are dead accurate. Wildcats a bit worse, and golden bullets suck
AR conversion with KMtactical 24" heavy fluted stainless upper and 10-40x scope with 3# JP trigger
Wildcats - baseball sized groups, maybe 1 in 10 fail to load properly (either fail to eject completely or fail to close bolt all the way on next round
Thunderbolts - horrible in AR conversion. 1 in 5 failures same as above, and not real accurate. And a few fail to fires. These must not like the lighter firing pin strikes with the #3 hammer/trigger combo
Golden bullets - Not quite as bad as the thunderbolts for feeding/jamming, but close. And accuracy far worse.
Winchester 555 - Runs flawless. And accuracy that rivals the thunderbolts.
AR conversion with KM 18" upper and reflex sight with mil-spec trigger
Pretty much same as the other AR. Feeding issues with the unplated wildcats and thunderbolts. But without any mis-fires with the thunderbolts because full weight mil-spec trigger.
Results with the AR's were as expected. Because everyone said unplated bullets dont feed well. My go-to ammo now is the winchester bulk 222/333/555 stuff. Because its splitting hairs when it comes to accuracy vs the thunderbolts in the bolt guns. Even though the TB's have a slight edge. They just dont work well in the 22 conversions.