[Unclenick]

Note that it is best to use a powder that is intended for light bullets, like RE10X. Benchmark is probably fine, too. There is some argument about whether the secondary pressure spikes that appear on strain gage instruments when you use a slow powder with a light bullet are real of some sort of odd reflected wave in the instrumentation. It is certain that Charlie Sisk has been able to blow up muzzles with loads that show the spike, so I would be cautious.

Bullets can strip their cores and lose accuracy if they are given too much rotational acceleration, so you want to watch for groups opening up unexpectedly when there are no pressure signs. Harold Vaughn was able to demonstrate this in his book, Rifle Accuracy Facts. A slower twist can fix that. So can using a lighter load.