Thunderbolts are cheap junk, goldens are worse. They will function for a while (maybe longer) in some guns than others. Just holding some goldens in your hand will leave that gold faerie dust in your hand that EVENTUALLY jammed up the bolt on my 15-22 & required a full bolt strip to solve the problem. The rest of the gun looked perfectly clean, but a bolt strip every so often with any ammo "should" keep it running 100%. The brand/type of semi auto matters.