"It is very easy to try to get the answer you want by simply labeling contrary evidence as being unreliable." [ie, - myth]
"It is also irrational. It isn't so just because you say so. You need to prove it."
I will gladly deal with the specifics if you will tell me specifically what you are claiming. You say the rifle was incapable of the shooting. Do you want to narrow that down to some specific issues?