I like my tubular magazine on a fast handling lever action rifle/carbine in wooded aeras but once in a while I come to a open aera were long shots are possible. I often think of making a cartridge with a pointed boat-tail bullet for those aera. I would put one the chamber and one in the tube magazine only. I don't need proof to know that the point of bullet is about as close as to a firing pin as you can get and it being right against the primer will not give me a comfortable feeling