This is a FWIW, observation only (the subject of which is sometimes an irritant to me).
I have seen a lot of threads where the OP asks a specific question and gets mebbe 10% of related answers, at most, and 90% semi or unrelated comments. I saw a thread this morning on another forum where the OP asked for opinions between 2 lever guns. 15 replies and one commented on leverguns and 14 others told the OP of their choice of bolt action rifles, and it was a levergun forum! On this forum today I read a thread asking about a specific powder, in a specific rifle, for a specific velocity. None of the 15 replies pertained to the powder, rifle, or velocity. Some posts told of personal loads with a few other powders, in other rifles, for other velocities. Some even touched on the legal aspects of reloading manuals' listed data and none of the replies had anything to do with the specific powder and loads in the specific rifle.
So, am I wrong about "thread drift" and "bunny trails" (semi-related posts of little or no real worth to the questioner/OP)? Mebbe I'm just asking too much to have an answer to a question that pertains to the original question? Or am I just ? Or should I expect one out of 15 replies to directly amswer my question with 14 others telling me I'm as crazy as their cousin's brother-in-law's friend's PaPa?