I built a 6.5prc but if I had to do it all over again, I’d probably go 6.5x284 since I can find brass for that right now. I haven’t found any good 6.5prc brass in many months despite being on many email lists. I’m looking for Lapua, Peterson or ADG.
.264 Win Mag 8 or 8.5 twist barrel 140 +\- gr bullets. Or standard 9 twist with 135 grain minus bullets which is ample for the hunting you described. Brass is easy even if you have to re-size 7RM brass. Get Larry Willis’ belted magnum collet die too. Don’t believe the “barrel burner” BS.
If it was me I and max range was 500 yards I would build a 6.5x47 or 260 ai both of these are on my list of what I want to build when funds are available I don't have any custom rifles right now but from the research I've done both of these cartridges are at the top of my list. Just my two cent
I love my 260s. lots of brass available (more than 6.5 creed and prc These days) and very easy to load on that cartridge. I have a Remington 5r gen 2 and a Tikka CTR. I want to build a 6.5x47 one of these days too…