Having a 10 bore rifle choked gun almost finished built by Purdey. ( Purdey used the name “ rifle choked “ ) to describe their paradox equilivent. I am led to believe a 10 bore paradox (holland) was never a true 10 bore, it was slightly under 10 bore. My 10 bore Purdey should be a true 10 bore. The Purdey is built as a rifle 27” barrels with an extra set of smooth bore barrels 32” for goose in the NT Australia.