Finally shot it.
Was okay. 17 and 26 seemed more accurate.
If I remember correctly, I was shooting about 4-6 inches at 25 yards with those (factory ammo).
The new 21 was shooting 7.5 " at 16 yards with s&b 230 fmj
Tried some workup reloads at various powder loadings. shrunk to 2.5" but wouldn't cycle. 3.5" and would cycle.
Pics to follow.