I have a .358 win BLR Lightening, it has a 20" barrel, I am not sure of the twist. It is very fickle with what loads and projectiles it likes.
The 225 gr game king is best in my rifle followed by 225 partition, but the 225 AB groups like shot gun scatter.
I am confident taking shots on large deer out to 250 with this rifle but even at that range your shooting a rainbow, if you truly want to shoot at the ranges you say I would not be using the .358 win.
Load the Barnes 200 gr TTSX and the rainbow goes away some and 250 is easy. We killed a couple of truckloads of critters in Africa with said bullet. My warthog was dropped at just shy of 250 holding right on his back line.
