Accuracy and patterns are two different things entirely.
it will pattern differently depending on whether or not you keep it cylinder or run a choke in it. So you can decide if you want it to be 'accurate' or not with buckshot. Dlask offers both versions, or will thread one of their barrels before you buy it. If a choke is important to you, the Dlask version is probably a better choice than teh chinese version. The Dlask barrels are very heavy profile and can be threaded for chokes no problem. Some of the chinese barrels are too thin to be threaded. Some gunsmiths will do them, and others ay not to as wall thickness is too thin. Some chinese barrels also arrive out of round which might be why some can threaded and some not.