A skeet gun should have open chokes but they could be oredered any way the customer wanted. I have a VHE 20 skeet with a 13.5 LOP
a slip on pad takes care of LOP.
I think the better term would be skeet configured. Checkered butt, SST, BTF, ejectors. Most skeet guns had 26 inch barrels but I have seen them with 28. I once had a GHE 20 w/28 inch tubes, I miss that one.