Conventional wisdom on bullet weight flies out the windown when discussing monometals. There is no reason to run a midweight or heavy-for-caliber monometal, unless there's some sort of ballistic concern (with grooved bullets, not usually the case...).
45 vs 9 is irrelevant.
Unless you are concerned with the ballistics part of wind drift.... and that can start to apply at 300 yards easily in wind. Most folks don't need a mag though, have no business shooting past 200 generally speaking if that far, and are overgunned for most parts. But I digress.
I run mono and still run fairly heavy for caliber and have yet to see a failure. At least in the larger rounds. Smaller rounds with mono, speed seems to help.
