Percussion Caps.

[springfield art]

#10 caps are slightly smaller in size. It varies with the company that manufactures them. Some #11 caps are #10 size. RWS is 1075, that's 10 3/4.

I saw some old caps at an auction marked #12; must be an obsolete size?

 

[dave951]

Anyone using these successfully for a modern in-line? I have a Knight I haven't shot in a while, also a Cabella's kit built .50 cal percussion rifle but can't find #11 caps. Can the 'musket caps' for squeezed to work on these??

No

 

[SmokepoleSam]

If you can find a musket nipple with the right threads for your gun you can. Try Track of the Wolf or Dixie.

 

[Zonie]

Anyone using these successfully for a modern in-line? I have a Knight I haven't shot in a while, also a Cabella's kit built .50 cal percussion rifle but can't find #11 caps. Can the 'musket caps' for squeezed to work on these??

We don't talk about in-line rifles on the forum. This site talks about the old fashioned traditional guns and talking about in-likes is against the forum rules.

The folks at our sister forum, Modern Muzzleloaders

Here's a link to them

https://www.modernmuzzleloader.com/

 

[Notchy Bob]

I saw some old caps at an auction marked #12; must be an obsolete size?

Yes, I think #12 caps are obsolete, although I believe in the early to mid-20th century (and possibly earlier), they were the most common size. They are slightly larger than #11 caps.

My dad accumulated a collection of old-time steel nipples in different thread diameters, .250" x 28, .255" x 28, .260" x 28, etc., all with cones sized for #12. I was going through my plunder a couple of days ago and found four full tins (100 count) and one partial tin of Alcan #12 caps from a box of 10 tins that we bought in about 1968. I'm planning to put one of the old nipples on my Hawken fullstock and try these old #12 caps if I can ever get back to the range.

I wish the manufacturers would bring #12 caps back into production. The size difference is not much, compared to #11, but it is visible. The slightly larger caps are just a little bit easier to handle, and might just be a little hotter than comparable #11 caps, as they probably hold just a little more of the priming compound.

Notchy Bob

 

[springfield art]

If you can find a musket nipple with the right threads for your gun you can. Try Track of the Wolf or Dixie.

Dixie's catalog states you can actually send them the nipple and they can do a match, if possible. I just got the 2021 catalog, order one every year.

 

[Rfp10000]

Does anyone know the amount of powder that is contained in a percussion cap?

 

[Old Hawkeye]

Does anyone know the amount of powder that is contained in a percussion cap?

There is no powder in a percussion cap. It contains a chemical primer compound that detonates from an impact, which in turn ignites the powder in the gun.

 

[Rfp10000]

There is no powder in a percussion cap. It contains a chemical primer compound that detonates from an impact, which in turn ignites the powder in the gun.

I used the word powder incorrectly. I wasn’t asking if there was gunpowder in the cap.
what I was trying to find out was what is the weight in grains of the priming compound in a standard percussion cap.

 

[mooman76]

You might try reading a couple threads down "making percussion caps".