Hello the room,
I sent a PM to a friend but I think I had better explain here ....
A friend loaded up 50 rounds of .45-70 to use in the rifle ... loaded with 62 grains of Swiss (Don't remember whether it is F or 1.5 F).
Again using the Vernier Caliper just above the cartridge, I got readings from .420 to .458 .... dunno ... supposed to be all Lyman # 457125 bullets .... don't know enough to know if I was measuring a lube 'valley, but I don't think so.
Anyway, the wind must have been 30 gusting to 40, knocking off hats and blowing lightweight wads cleaning supplies all downwind ...
It was agreed that were I to get the gun sighted in, (which was highly improbable)., it would only be accurate under the same unruly, unnatural conditions .... and I was kindly offered the same kindnesses at the next meeting one month from then ... which I accepted ... 'cause it would get me time to find/make some shooting sticks, beg/borrow or purloin a shooting scope, etc.