It is possible to shoot the 20 gn Zan in .177 with good results 👍🎯😉 In the slug barrel, that I am testing, they shoot very well and accurate at 952 FPS - 40.3 FPE 👍🙂🎯 So it is possible ! I see Peter, the Viking Airgunner, has also switched to a LW polygon barrel 😉👍