Originally Posted By: 2-piper
The actual shot charge weight is not the important factor, but rather the Pressure of the load.

Now we are getting somewhere.
I know that the old 3" pigeon loads were a lot of wad in that length & also not a really high pressure load.
So, what sort of pressure would those old 3" 1 1/2 oz loads be ?
This would give me a real figure comparative to modern loads.
O.M