To start: I have searched the forum & couldn't find this topic, so here goes.
I've been shooting & cleaning weapons for over 40 years. Every so often, I hear someone state that when cleaning a weapon, the cleaning patch(es) should ONLY be pulled or pushed through the barrel "in the direction the bullet travels." When I've asked "Why?" Nobody has ever been able to give me an answer that makes a lick of sense and then it always ends with: "That's the way I was taught."
With all of the expertise in this forum, I figured that somebody might know if this is actually true (or not). If it is true, please explain "Why?"