My .22's love Remington Thunderbolts and Golden Bullets. I shoot them in the Ruger Mk1 5.5" bull barrel, the SIG 522, the Winchester 52B and the 10/22 (the 10/22 does better with the Golden Bullets.
My son thought he got better groups in his AR15/with .22 conversion kit from the Federal bulk pack .22's but they leaded the hell out of his barrel. Took days to scrub the lead out. Ruined several brushes, left a pile of dirty patches, tried multiple liquid/spray bore cleaners, finally went through almost a hole pack of a special lead removal patch material (whatever it was soaked in stunk pretty bad but worked pretty good.)
Never had much luck with Winchester .22 ammo.
The SIG 522 doesn't mind Federal .22 ammo and does almost as well with it as the Remington ammo.
I bought a brand new brick of Thunderbolts a couple months ago at Walmart and took the 522 to the range. 100% funtion in the SIG.
As recommended above, buy different brands/bullet weights and shoot them through your gun. Yours may "like" something that doesn't work well in other guns. .22's are "funny."