I have a ziploc full of once fired 300WSM brass from a friend who does not reload. I was saving it in case he ever needed me to work up some loads but it’s been like 10 years. I almost recycled it the other day. PM me if you want it, you pay postage.The advice to find brass and dies before you commission the build with the smith is very wise. I recently bought a 300wsm on a lightweight magnesium chassis. ♂ I don’t have any brass or dies. Luckily a friend had a couple boxes of rounds, but that will only last so long.