I think too many different guns causes technique issues and there likely all different shapes,sizes,calibres etc etc which causes strange poi.
I had similar last weekend. Shot a bughole 3 shot group checking my load as the action came out the stock for a paint job..
Group shot a 1/4 right and 1/2 inch high..
Adjusted down only as I had a full value wind right wind and shots went 2 clicks low and 3 right and strait away this doesn't add up and I thought it's something I'm doing as the 2nd group was a bughole the same as the first group ..
It's positional zero shifts somehow. Definately shooter error
I had similar last weekend. Shot a bughole 3 shot group checking my load as the action came out the stock for a paint job..
Group shot a 1/4 right and 1/2 inch high..
Adjusted down only as I had a full value wind right wind and shots went 2 clicks low and 3 right and strait away this doesn't add up and I thought it's something I'm doing as the 2nd group was a bughole the same as the first group ..
It's positional zero shifts somehow. Definately shooter error