KYODE, et al. The 358x375 is merely a 357 Herrett loaded in a much stronger case than the traditional necked 30-30. I've been using 375 win brass in mine forever! 350 Rem mag is awesome in an Encore, but I really don't think there is alot of difference between the other 358's in the Encore, with some obviously giving a little more punch than the others. 35 Whelen and 358-06 are thumpers, but I really don't think any will out perform the 338-06!! Mine is extremely accurate and fast 200g@2650fps 15' muzzle and the brass still comes out very easy! How's that? I can long, sleek 250's at 2500 with no sweat, and recoil is very manageable!