Check Wolff Springs website...they have a helluva broad inventory. But...
I had a Win 70 in 300 WSM come in quite a while back, failure to fire. So I checked the usual suspects, found nothing. I didn't have any loaded ammo, or dies, so I just reprimed some fired cases the guy sent along, and popped the primers...no malfunctions, good firm primer strike, .066 firing pin protrusion.
So I sent it back, he called me, said it was still mis firing. After a lot of back and forth, we decided it was the factory ammo. Might be worth looking into.