I will say my 2 favorite calibers are 300 Win Mag, and the 7mm Rem Mag. They are so pleasant to shoot. I have a T/C Encore 7mm and 300 and also 2 Weatherbys in 7mm Mag.
I load the Sierra 140 SPT in Winchester brass, Fed LR primers, and 62.3 grs of IMR 4350. Not quite as steady as the years in the Army but still do good and have fun.