Oh, not so bad.
There's still some places with good supplies of mil surplus ammo.
Quite a bit of good brass available.
Missouri Bullet sells a nice cast bullet just right for the carbine.
All ammunition is going up at staggering rates.
I think a lot of the cost is in the high metal prices among other things.
30 Carbine FMJ goes for 30 bucks a box around here, more than I want to pay.