Optimum Revolver Nipple Orifice

[Dude]

I've been trying to find the answer to this question with no luck. Rifle nipples? No problem - .024-.028" is the answer there.

I'd think that revolvers should be about the same or maybe even less since the flash channel is short and straight into the charge. Has anyone researched this topic and posted results?

I'm fairly new to BP and hadn't checked my revolvers till now, but the common viewpoint is that OEM nipples are junk and need to be replaced even before the first use. So I measured the Slix shots in a new-to-me pistol and they're right at .037". Huh? They evidently come new with an orifice that large, but why?

What's the optimum orifice for revolver nipples?

 

[FishDFly]

Would think that Slix shot would know their job.

 

[Johnny Tremain]

The stock ones worked, the SLix Shots work.
They say why on their website.

 

[Dude]

With rifle nipples, orifices are all over the map with only a few manufacturers getting it right. Just because the slix shots work doesn't necessarily mean the orifices are the optimum size. At what point will the hammer blow back on a revolver? Probably depends on the powder charge, orifice size, hammer spring and projectile weight. Will a revolver hammer EVEN blow back? I seem to recall a story about a Walker being charged to the max and having the hammer blow back.

I don't think there's any question that the larger the orifice, the less pressure behind the ball/bullet. So I'd think it would be valuable info for those wanting highest velocity, to have the smallest opening which still allows good ignition.

Another thought - does the cap seal the nipple well enough that there's no leakage, thus no loss of pressure?