I'm doing the same thing as you are right now and just bought a gently used rifle to start playing with.
After lots of research, a general trend became apparent to me that wasn't as obvious as I thought it would have been in the beginning. That trend is that .....the bigger you go in caliber, the more expensive it is to get into it, and the more expensive it is to continue shooting it.
Simple example....I bought a 7mm Rem Mag for $325 gently used. I can buy all the reloading components for 7mm for less than $175 and start loading. That number will get me a minimum of 100 practice/hunting rounds loaded decently well-----not as good as some of these master reloaders here, but pretty decent reloads.
So......without optics, which will equally apply to ANY rifle and caliber chosen....I can be on the range with my choice of rifle and caliber for around 500 bucks.
Do the same comparison on something like a 338 RUM and see what happens.
The rifle alone will cost you more than what I have in my rifle AND reloading components. Of course I already own a press, scale, priming tool, etc, etc...
But the point is.....the bigger you go, the more expensive it is to play this game.