Update.. with KNS 0.52" front post on it, at 100 yards off the same Caldwell 'bag' today at the range.
With the mods as noted in my rebuild post near the top of this sub-forum..
2 mags. 5 rounds each and the 182gr with 'irons'. top group had 1 round just above the target strip..
Busted 2 more 'clays' today with the irons too within 2 shots at each..
Overall happy with the 60+ year old surplus ammo.
Got 580 rounds thru her thus far..