Methane , never thought about that . Guess I need to start looking . Think I got a few . Have thought about shooting a deer or two with it , for old times sake . My next older brother gave it to me before he passed and he keeps telling me to pass it on to one of my grandchildren , or great grandchildren , not to screw it up ! That's why I been looking for a pre 64 , mod 94 but every time I see one on here , it's already gone . He also had a 94 , gave it to my nephew and he traded it for some piece of junk . I killed a lot of deer with it and would have paid him a good sum for it ?