Actually, this brass is superior even to Lapua or Norma. It's just way too thick in stock form for consistant shooting.
Turn the necks though..Chamber your barrels tight...All the difference in the world.
The 243wssm is a bit too much of a good thing. Low barrel life.
The 257wssm is a great cartridge IMO. This is where Winchestor should have started the lineup. But there aren't alot of 25cal bullets that are worth bothering with.
Best in my view(and my safe) is a 26wssm. It rocks.
243wssm = 243ackly,257wssm = 25-06. The short ctgs have had feeding problems and in the extra short actions the bullets have to be seated very deep into the powder space.Most new ctg developements are for marketing and $$$$ for the makers of same.
Old Bear is right. Use of a standard 243win case(regardless of cal) get's you there in factory actions. The wssm isn't really an improvement over other cartridges in this capacity.
My 26wssm works great because it's in a custom, single shot action. The necks are turned/fitted to a custom chamber. I found this brass to be very, very consistant in thickness variance and h20 capacity(better than typical Lapua brass). The gain for my trouble is super low ES(usually ~8fps) using IMR4350 powder.
But truth be told, a 260 has the same capacity, and would perform as well overall.
I to have an interest in these two cartridges. I have Win M70 Stealth II available for both.
Brass seems readily available, priced, Win 243 for comparison--about a third more. Quality, have no idea.
Bullets for both don't seem to be a problem.
The 243 WSSM is about the same as the 6mm Rem. Why would there be a problem with barrel life??
Toying with the idea of trying some F-class. Not that far from Bodine Pa.