A gun is a tool. Pick the caliber that will do the best job for your application, and that remains within your budget.
Sounds more like you just enjoy felt recoil. Get the biggest pistol caliber you can afford to shoot. Same with rifle.
I’ll agree with Rick on the 6.5 creedmore. It is ballistically superior to .308 and quickly gaining in popularity, but it might not be enough recoil for you liking. Get a .308 gun with a 16” barrel like a socom. I think you’d enjoy shooting that.