Ya, ammo has gotten expensive, as have reloading components.
When I got my 375 in about 2008/2009, I did real well. Bought the used Number One in a local gunshop at a good price. Found out it had once belonged to our own Mule Deer here on the 'Fire. Contacted John and he confirmed it.
The rifle also came with some ammo, some handloading components, dies, and a magazine with one of John's articles about handloading for that rifle. Easiest load workup ever! Just build the same ammo that worked for him.
Then a couple of buddies sold me their ammo and components at budget prices. I've been incredibly fortunate in being able to shoot and hunt with a great rifle for a pretty ridiculously low entry fee.