.40cal Double Ball Accuracy test: Figure 8’s at 50yds

[Geraldo]

Still troubles me that you are basically now shooting proof loads.

Stumpkiller, how is he shooting proof loads? As I said in the other thread about this, two RB are roughly equal to one conical in a given caliber. In some cases they are exactly equal. How, if it's safe to use a conical can it be unsafe to use the same weight in RB?

 

[750k2]

I brought this up about 5 years ago and got hammered then.
I'm still here. It is internal ballistics and not that big of deal.
As long as they are held tight on the charge projectile weight
dictates powder charge.
As long as your not running at the redline let your rifle tell
you if it works.
After all they are nothing more than fancy cannons.
As long as there is no air space psi will be linear with no incursion.
There was also some studies that thought that the powder charge actually acted as part of the projectile weight diminishing as it burned off.
I also remember an article where they filled a section of bbl
with powder and put 2 breech plugs in and lit it with cannon fuse. All the powder burnt and gasses made it out the touch hole.
:surrender:

 

[Stumpkiller]

Still troubles me that you are basically now shooting proof loads.

Stumpkiller, how is he shooting proof loads?

Doubling the ball/weight and doubling the powder. You'll note that most of the T/C load tables don't have as much powder as the max load for a conical as they do for the ball, stopping 10 to 20 gr short. That's due to pressure.

But go ahead. I truly no longer care. :idunno:

I also remember an article where they filled a section of bbl with powder and put 2 breech plugs in and lit it with cannon fuse. All the powder burnt and gasses made it out the touch hole.[/img]

That was Turner Kirkland & DGW again.