Too many folks act like every shooter is beholden to buying one round at a time, solely sourced through their local Walmart. An XPR is a hunting rifle, great value and quality in its price point, but it’s not a format which is commonly used for high volume fire. A 325WSM barrel would only make it around 2,000-2500 rounds, so a guy could buy up 500 pieces of brass and easily live out every shot of that barrel’s life. It’s not expensive enough that it’s really going to be an inheritance left to anyone later, and there are enough short action magnums out there now to ensure there’s always some utility to be had from the action if someone really didn’t want a 325 wsm and chose to change its stripes.
Finding brass and ammo for the WSM and WSSM’s hasn’t always been something accomplished on a whim, but the same can be said for RUM’s, 38-55’s, 44-40’s, 220 swifts, 6BR’s, and a few hundred other cartridges which might be somewhere in the lower volume end of a spectrum between “available at Walmart” and “have to send a few emails and wait a few months to find it.” Many of us live happy with cartridges for which ammunition and brass can’t even be purchased - anywhere - so it’s kinda silly to pretend the WSM’s are SOL.