the .25 cal.sumatra is far superior to any spring or nitro spring gun.With LBTs 50gr.fn.I get 22lr.killing power,and exelent accuracy to 200+yrds.I spent a fortune on various spring guns,for my needs it was money wasted.I do not have any now.PCP air guns are the only way to go.If you are serious about hitting&killing clean at long range,you connot go wrong with the sumatra.