Gemtech's subsonic load is ideal for suppressor usage.It puts together a heavier bullet, cleaner powder and premium lube on a lead round nose projectile that gives consistent velocities and harder hitting performance at subsonic speed.Specifications: 22 lr/42 gr/lead round nose (lrn)/50 per boxCaliber: 22 LRBullet Type: Lead Round NoseBullet Weight: 42 grMuzzle Energy: 103 ft lbsMuzzle Velocity: 1050 fpsCasing Material: BrassRounds Per Box: 50Hazair: Yes