8 Gauge Bore Leading

[Ed Blake]

Thanks Craig. What an interesting concept. Is there much pressure difference between the reverse stack and the conventional stack loads?

[6pt-Sika]

Bit of adjustment .

[Craig Larter]

Originally Posted by Ed Blake

Thanks Craig. What an interesting concept. Is there much pressure difference between the reverse stack and the conventional stack loads?

The stacked load was 1163fps, 7066psi, the traditional load was 1183fps, 6833psi. Basically the same.

[Mike of the Mountain]

Ed, if you didn’t clean your barrels you wouldn’t have a problem. Just sayin’

[6pt-Sika]

IMHO if BPI tweaked their wad by making the shot cup big enough to hold 11/4 to 11/2 ounces of shot a good bit of the leading would go away . But bear in mind the bores on a good many of these cannons are pitted a bit so that contributes to the problem . Of the ones I had I only think one of them had any wear close to a mirror bore and I’m not sure that one hadn’t been professionally polished before it came to me . It might be useful to try a Mylar wrap seated in the shot cup and high enough to cover the shot column as well as putting the spacers beneath the wad . BPI makes a 10 gauge gas seal that I’ve messed with a bit , it would be Intresting if they made the same seal to fit an 8 gauge hull putting it over the powder followed by whatever displacement spacers you need then the BPI wad and the Mylar wrap around the shot .