I no longer have my 7X57, but when I did I used bullets from 139 to 175 and the ones I had the best luck with were the 160s and 175s. The 139 were too prone to break up. The Remington 150 grain CLs were fine and so were the 154 gr Hornadys Spire points. The 160 Nosler Partitions, 175 Partitions, and the 175 gr Hornadys in both round nose and spire points all were perfect in every instance.
None of these ever left me with any complaints at all.

I killed deer with all those above and I killed elk with the 175 Hornady RNs and the Noslers in both 160 and 175.