I have shot SSS out of Anschutz and Valmet target rifles and it groups OK with no keyholing. However conventional ammo groups much better out of the same rifles.
SSS is really a specialty ammo. It isn't any quieter than typical subsonics but it does offer a lot more hitting power.
SSS is really a specialty ammo. It isn't any quieter than typical subsonics but it does offer a lot more hitting power.