This is not a SFW instance. NSFW communities will be tagged, and efforts will be made to keep SFW communities clean, but proceed at your own comfort level.
Most U.S. gun owners use lead-based ammunition and primers, and nearly half don’t engage in any post-shooting hygiene behaviors such as changing their clothes or showering, a study found.
Of course it isn’t an energy multiplier. The energy carried as the bullet leaves the barrel will be very very close to the same. The energy it carries will be lost more quickly to air resistance with a less dense round though. Especially since the same powder behind less mass, means more speed, means more air resistance. How much that matters depends on a lot of factors, but it can certainly be enough to matter.
Of course it isn’t an energy multiplier. The energy carried as the bullet leaves the barrel will be very very close to the same. The energy it carries will be lost more quickly to air resistance with a less dense round though. Especially since the same powder behind less mass, means more speed, means more air resistance. How much that matters depends on a lot of factors, but it can certainly be enough to matter.
Unless you’re a sniper working from 100+ yards, you do not need to care about the energy delivery difference air resistance would make.
Even then, it’s more about bullet drop and far less about suddenly losing lethality.