I just got some.22 cal JSB Knock Out slugs, two sizes .216 and .217 Dark is fast approaching, so I put some HBN powder on them rotated the tin to cover and took them out to try in my HW98, Shooting at soda cans and one of the Crosman dueling tree targerts I was impressed, especially considering the gun had been zeroed with much lighter weight slugs. The .216 pellets dropped right into the breech, and I think the .217 might acutally be a better fit but will save that for another day.