Just for starters, re-enactors are the last person you should consult about how to properly clean, or care for your muzzleloader. I attended a large civil war re-enactment in Northern California, and had the opportunity to examine a wide variety of replica firearms there. Virtually every one I examined was either damaged or totally ruined by poor, or no cleaning.
Peroxide is an oxidizing agent, that has no business in the bore of your gun. It works its way into the threads of your breechplug, vent, or drum, and any other treaded fitting on the barrel, and causes damage. It’s possibly the worst thing you can clean with.
I used to manufacture a cleaning solvent for black powder, but now I clean with plain old cold water.
We need to stop trying to make shooting, and cleaning muzzleloaders complicate. Use what the old timers used. If it didn’t work we would not be here, and neither would the fine antique firearms we all admire.
Hungry Horse