Yep , steve built it maybe 4 years ago there is a bit of talk about it localy but not many people have seen it in action . To be honest i dont know much about technical data but i think your mate would do better without ballistic tips but you would have to talk to steve about that , all i know is how this gun performs , its an eye opener as to how many you have about as before you might leave one because it was too far for the 250 and go home thinking you had killed one and seen two others , now you come home with four in the bucket having killed all youve seen its a hell of a tool and i can shoot a bit