The 6.5x55 Swede is an excellent choice for almost every purpose, assuming you are not hunting T. Rex at 1000 yards. Military bullets are usually 160 grain, thus having excellent sectional density and providing very deep penetration on large game. Or you can handload about any bullet weight and type available to suit your needs. It is also popular in the Nordic countries for target shooting. Back in my Bench Rest days (nearly 50 years ago), I had a custom heavy-barreled (Douglas) Mauser action rifle made up in 6.5x55 which I used in Sporter Class competition. It kept up with everyone in 100 and 200 yard matches. I found that it handled 130 grain bullets best. I still have a Swedish Mauser M96 and a Swedish military Ljungman AG42b, a rifle many have probably never heard of. Except it was the inspiration for the design of the direct gas impingement action used in the AR-series rifles. And it shoots like a target rifle.