Talk to them and see if you can find out when their trucks come in. We have a regional place called Bridgeport equip, has like 8-10 locations, and they get stuff by the pallets, set it out, and it goes quick. Just helps to know when they get it.
.380 has always been hard to get. 30-06 should be easier, i don't have an 06, I always used 7mm for game. I'll keep an eye out and hit ya up if I see any deals avail.
I think 9mm is nearly impossible to find right now. I've stockpiled over the last few years 9mm, .45, and .223. Only have 5-600 .380 bc its been so hard to find.