Deciphering Dominion Shotshell topwads

I’m currently cataloging some Canadian shotshells and would love some help understanding the information on the topwads.

I’ve selected a random sample. I get the powder, DCCo and shot size references, but what’s the deal with all the fractions? It seems very complicated and no longer in use today.

IMG_5059 IMG_5060 IMG_5061 IMG_5062

Thanks,
Paul

Hi Paul,

Topwad numbers indicate the load [shot] size on top followed by the powder load in drams and the shot weight in ounces.

Regards,

Fede

Thanks Fede. That makes perfect sense!

Paul

Here’s a few more that don’t work use drams. Would these be in grains of powder?

IMG_5063 IMG_5064 IMG_5065 IMG_5066

It’s quite a range of both charges and powders that are on these are all 12 ga ‘Canuck’ headstamped shells.

Paul

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Yes, those are smokeless loads expressed in grains. Ballistite and Infallible are dense powders where 24, 26 and 28 gr equals to 3, 3 1/4 and 3 1/2 drams of black powder, respectively. Smokeless Diamond is a “33 grain powder” type (33 gr = 3 drams) where 39 gr equals to approx. 3 1/2 drams (exact equivalent is 38 gr).

Regards,

Fede

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Great stuff Fede. Thank you so much. You are a treasure!