I've owned, used both. I have no pref over either one. I used the 180 xbt in the 300WM on PG and the 340Wby/210 also on PG. Shot a couple head with my friends 338/200X while over there. I couldn't tell any difference in the reaction of any animal, really. If you like heavy bullets, 338WM is your huckleberry. If you like fast and flat, a 180/185 in each do the same things, with the 338 cutting a slightly bigger hole. Good luck to you pard.

Last edited by Jim_Knight; 12/03/19.