Thunderbolt is both unreliable and filthy. Wouldn’t buy it if it was $5 a brick.
I bought a pile at $10 a brick.
Lowly ammo but it works fine in the Marlin 60 and the Ruger MkII.
No go in the Ruger 10/22 takedown.
BTW The Bolt lock in the Ruger 10/22 sucks.
That needs modification.