I happen to live about 30 miles from the North store at Camp Perry and believe it or not only make a couple of trips a year there one in the first week of August during the rifle matches to hit Vendors Row but always stop at the CMPicon store. I have purchased 2 M1icon's from them an Inland Carbine and a Smith Corona 03-A3 I have also helped several friends pick out their M1's. When I bought my 03 from them I got a can of LC 30.06 and thee man at the counter told me it was one of the last batches of LC they would get as the supplies were dried up. Since they have carried HXP the Greek equivalent of our M2 ball It is still available for 98 dollars for 240 rounds from the CMP. These are the same cans I see at local guns shows for as much as $140. the North store has no 03's or carbines left with no expectations of any coming in. There is hope once the present regime in Washington is ousted that the ones in Korea will return. I last visited Perry in October to pick up some more HXP and they had a good selection of M1's left but talking to a gentleman in December at a local show he claimed he was there the prior week and the racks were almost bear and only the high end rifles left.
Several years ago I ordered 500 rounds of .30 carbine from them and it took several months for it to arrive and it was Aquilia which may not be stout enough to reliably cycle your rifle.
One other side note when I went to pick up my Carbine and 03a3 on a Friday I noticed a 1 ton Dually pickup being loaded with cases of rifles and pallets of ammo and was decidedly sagging at the back bumper. the next day at a show 90 miles away I saw this same individual set up selling the same stuff with at least a 40% markup. $500 dollar rifles for $900-$1000 and at that time a $78 spam can of HXP for $130