Not to be pedantic, (yeah right) but the smaller orifice doesn’t increase the pressure of that jet. It increased the velocity of the stream and really either way works. I replace th steel nipples after 40 shots or so with bullet shooting rifles. I mostly use Ampco for the lighter weight bullets and replace them when they reach .032” or so. For heavy rifles I use the platinum lined BACO nipples. And I haven’t replaced one yet. Need to get out and shoot more.This applies to both cap and flintlocks. If accuracy starts failing, the nipple or vent have worn too large, giving uneven pressures. Nipples only need removed once a year for inspection and re-lubing. Some remove them every time, thinking they can clean a breech better. Think about a hose. How is more pressure created, with or without a nozzle? High pressure cleans better. All that removing them every time to clean does is to wear the threads.