Haven't had a chance to shoot it yet. Your right I have a .300 WM barrel that pops pretty good. I hunt mostly with my .50X209 barrel, but also really like a 7mm Rem Mag barrel that I picked up. The 7mm barrel shoots really well, getting 5/8" at 100 with Fed. Prem. factory stuff.
I've really rejoyed shooting and fooling around with the Encore and I think I'll like the .338. Don't really need a .338 for anything, but might be fun to shoot.
Might trade it off later. Always wanted a 45/70 barrel to try out.