I know that they have many errors, but COTW (10th edition) lists the 350 Rigby No2 as a 225 grain bullet at 2575 fps and the 350 Rigby Mag as 2625 fps. Still seems like the pressure would be greater in the No2 due to the smaller case capacity

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I am just getting into load development for my Rigby 350 Mag, and so far RL15 and IMR4350 seem promising. With the soft brass that I have I may be lucky to get to factory velocity or a little better (even though it is almost identical in capacity to the 358 Norma Mag). Yes, we all know the brand of brass, but it is the about the only game in town right now.

Jim