The reason to go with a WSM instead of a PRC or Win Mag in a long action imo is if that long action is short like a Tikka. The Tikka is a short long action. You can get about the same velocity out of a 300 WSM with a 215 seated long, as you can a 300 WM with a 215 shoved into the case to fit a Tikka action.I'm trying to wrap my head around this. A person could buy a .300 WSM in a SHORT action and that's great and all, but the 7mm-300WSM 'wildcat' gives about 6 more grains of powder? What are we talking velocity-wise? 50 fps gain? 100 fps? Okay...seems like a lot of effort and expense for such a small 'gain', but if that's what trips your trigger, sure...why not?
But if I'm reading this correctly, it's going to go in a LONG ACTION gun anyway? Wouldn't just getting a .300 PRC be...easier?
I feel like I've read this thread three times now and I'm still not "getting it".
If going with a full length long action IDK why you would decide on a 300-7mm WSM.