BP BLANKS for the 10ga cannon can be made up with 12ga hulls.
The 12ga hull will obviously chamber and the rim will engage the 10ga rim recess of the cannons chamber.
There is very little dia difference betw the 12 and the larger 10 chambers.
It was very common for 12ga shot loads to be used in 10ga SxS's in the distant past when times were hard and ammo not as easily available.
The 10ga generates even lower chamber pressures than the 12ga does when speaking of shotloaded shells.
BP blank rounds are very low pressure.
With the 12 in a 10 blank loads, the hulls may expand a bit to the 10ga chamber especially ahead of the 'brass' head.
But they work very nicely and from personal experience with a Winchester Cannon, these 12ga reloaded blanks do the same job as the 10ga blanks.
Hard card over powder and double stacked fibre wad with some hard wad pressure will insure a good report.
No need to pack anything on top of that and crimp them really. You can, but that is just adding more 'wad pressure', though very little compared to adding another fibre wad.
Pyrodex RS works well.
I had some elderly Clean Shot that did a good job but seemed to need at least a 3dram load and heavy wad pressure to get a good report...at least in our experience. Maybe the 'elderly' issue was at work there.
Good old BP is great, but it's getting tough to find.
The 12ga hull will obviously chamber and the rim will engage the 10ga rim recess of the cannons chamber.
There is very little dia difference betw the 12 and the larger 10 chambers.
It was very common for 12ga shot loads to be used in 10ga SxS's in the distant past when times were hard and ammo not as easily available.
The 10ga generates even lower chamber pressures than the 12ga does when speaking of shotloaded shells.
BP blank rounds are very low pressure.
With the 12 in a 10 blank loads, the hulls may expand a bit to the 10ga chamber especially ahead of the 'brass' head.
But they work very nicely and from personal experience with a Winchester Cannon, these 12ga reloaded blanks do the same job as the 10ga blanks.
Hard card over powder and double stacked fibre wad with some hard wad pressure will insure a good report.
No need to pack anything on top of that and crimp them really. You can, but that is just adding more 'wad pressure', though very little compared to adding another fibre wad.
Pyrodex RS works well.
I had some elderly Clean Shot that did a good job but seemed to need at least a 3dram load and heavy wad pressure to get a good report...at least in our experience. Maybe the 'elderly' issue was at work there.
Good old BP is great, but it's getting tough to find.
