thunderbeastarms (25)in #silencer • 7 years ago338 Ultra on 308OK uploading some stuff to see what video formats I can get to work. 338 Ultra prototype on a 308. ▶️ DTube ▶️ IPFSthunderbeastarms (25)in #silencer • 7 years ago338Ultra ShootersEarRayDog from Thunder Beast Arms shoots the 338 Ultra on AI 388 Lapua. Shooters ear sound test with B&K 2209. Shot…