80 Bore Tranter

[Vossie]

I have aquired a 3rd Model Double Trigger Tranter, long time coming but I got there.
Now there is always lots of love for the 54 bore, less so for the 80.
Load info is very hard to find, I would like to confirm that the 1/2 dram (13 grains) a good standard load for an 80 bore.

Cheers