I guess I have a different take on the 350 Legion. Living in Wyoming its not the best, most of my hunting of antelope and deer is north of 300 yards.
However, after all these years my wife decided we are gonna be Snow Birds, I we bought a house on a lake in Central Arkansas, just 8 miles from my mothers place. The family still own a bit of land there and Arkansas has liberal hunting seasons, A non resident lic comes with 6 deer tags. Dont know what you know about Arkansas, but our land would make the Jungles of Vietnam look like the Barren tundra of western Alaska. You're lucky to get a shot at more then 25-40 yards.
I'm always looking for an excuse to get a new gun and I'm a big time Winchester fan. So I get an XPR Compact in 350 legion.
I am actually impressed. Couldnt find any ammo in Wyoming for the little round ( surprise) so I ordered dies, Win Brass and Hornady 170 gr bullets. Hornady list lit gun as a good powder for the legion so I pick up a pound of it to try. I found tht 27 gr pushes the 170 gr slug @ 2298 fps out of the XPR Compact and i found it to be quite accurate. It recoils about like my wifes 243 our of her Model 70. Ballisticly it hits harder then the same weight bullet out of a 30-30. Easy to load for, doesnt need crimped in the XPR bolt gun.
People mentioned using cast bullets. First off its a .355 not a 357, In lead bullets the leat 125 Gr 9mm bullet works well. Hodgen reloading data again list lit Gun and a good powder. My mold cast the 125 gr bullet at .356, and again I use 27 grs, Vel is about 2550 and doesnt shoot that bad.
I'm not replacing my 6.5 CM or 270 as a Wyoming rifle, and I certainly wouldnt use the legion on elk, but as a short range white tail gun in the thick timber of Central Arkansas i think its gonna be the cats meow.
Heck of a lot of gun banging steel to 300 yards too. Cheap to shoot. Easy to load for and brass should last quite a while.
Ammo isnt too easy to find in Wyoming, but I reload anyway.