these are overpriced crap pellets it don`t take a genious to work out that if this type of ammo design was any good it would be winning prizes , Logun Penetrators, H&N FTT, Crosman Premier/Webley Accupel/JSB`S all outperform these plastic pellets for less money (in all my 3 rifles)
buy a mk2 and get a rifle that works great from box, not like most mk1`s that need blueprinting by Mr Bowkett to be really useable.