yep I bought 10 bags of rubber mulch from lowes. filled up a rubber made container appx size 3ft high 2ft wide and 3 foot long I fired a 490 rb with 60 grains into the 2 ft side of the container at 20 yard . the round ball did next exit the container. I moved back to 30 yards for the three shots at a target on the container now that I know it works I will build a proper box that will have a removable 2ft by 3ft wood panel that I will paint my target on and I will be able to save my lead I read about this online and it really works.