I only have one centerfire, a Ruger M-77 in .243 that I bought in 1980...I put a Leupold 3x9x40 on it about 10 years ago, had them install a Heavy Duplex Reticle...
I've shot the barrel out and had a Shilen 24 inch tube put on her and have adjusted the trigger to 2 1/2 pounds...
But, my favorite is my custom made .54 caliber flintlock...