I have, still have some 308 and 260. If we are talking about the same southwest ammo there is no way in hell I would buy a single thing from them. The ammo is great if you ever get it. Luckily, I bought mine when they were actually shipping ammo and I never had a single issue. However, just go look at the southwest ammo thread on snipershide and you can see that people have been waiting for over a year now for ammo. It also seems that some people are starting the whole lawyer thing.
Im sure it would, they made great ammo. I took their 175gr 308 ammo to my first rifle match before the PRS ever started. It was my first time shooting to 1000 yards and with a 20" 308 I got 2 out of 3 hits at 1000. Thats not the tell all with ammo, but it shot great and was very very accurate out of that rifle.
What caliber do you have? If its 260 with 260 brass and not the 7-08 brass Id be interested.