Those JSB's are (almost universally) like magic in most powerful .22's. I've been getting consistent 1.25" five-shot AVERAGE groups at 100 yards with them in a Career; sub-1" five-shot groups are common. Surprisingly, they're slightly more accurate at 950 FPS than at 900 in this Career. Those 18.1 JSB's are the most accurate pellet in many (most?) PCP's, and have an excellent B.C.