I've had a Ruger .270 since the early 1980's when it was given to me as a gift. Back then I used 130 grain Remington Core Lokt for deer and 150 grain Core Lokt for elk - and I killed several of each. About 10 years ago I went on an elk hunt in Idaho and wanted something with more knock down power for bigger bulls, so I used 150 grain Nosler Partition and brought home a nice 5 point bull. Since then I have only used the 150 Nosler Partitions and have been very happy with how my Ruger shoots them.