These pellets are manufactured soft for easier expansion, providing incredible hydrostatic shock on impact which can be heard by the massive clap sound produced on impact. Their penetration is not much as they will deform rather quickly, even w/ a 40+ fpe rifle, causing a lot of inertia due to its bullet deformation. The ballistic performance for its short penetration, however, is a level that hollow-tipped pellets do not begin to contend with.

Despite the lack of penetration, it should be noted that, whilst the wound cavity will not be significantly deep, it will be broad. Also thanks to the high ballistic coefficient / energy retantion across a given fired distance, slugs typically hit harder and on impact, release hydrostatic shock - this you'll note for example, when you hear that "exploding" sound and a bird's feathers scattering as it is struck, for example. With higher powered air rifles, alot more than just feathers will scatter.

Technical Specifications:

Brand: JSB / Czechoslavia manufactured

Projectile shape: Bullet shaped; broad at the rear w/ JSB's proprietary rear pellet inset. Narrows gradually toward the front w/ well defined hollow tip at the front, surrounded by firm-looking walls that will aid in slightly better penetration before yielding

Pellet length (mm): 5.500

Pellet at broadest: .216" / 5.486 mm

Packed per / Qty: 150

Ballistic coefficient (BC) : 0.084 - stated / listed as such on the packaging, however, this will vary depending on muzzle energy, humidity %, elevation above sealevel, etc.

Weight - 1.645 g / 25.39gr.

Calibre designation - .22 air rifle.

Please see this YouTube video for an interesting review on theese slugs