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That is why when some people say a 12 bore or 12 gauge can't do this or can't do that, I hold judgement and ask---"What was the load? Not all 12 bores (gauges) are equal. Not even close."

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Interesting they used 30gr. per dram, while a dram is actually 27.3gr.

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Daryl:
The reason for using 30 grains per dram is that 'modern' black powder (especially Goex!) is around 10 percent less 'powerful' than the original stuff more than a century ago. That's progress!

Using 30 grains per dram will achieve 'proper' regulating velocities in most black-powder doubles. This was explained elsewhere in Frank's article I believe.

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Marrakai
When the bull drops, the bullshit stops!
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www.marrakai-adventure.com.au

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The reason for using 30 grains per dram is that 'modern' black powder (especially Goex!) is around 10 percent less 'powerful' than the original stuff more than a century ago. That's progress!

Using 30 grains per dram will achieve 'proper' regulating velocities in most black-powder doubles. This was explained elsewhere in Frank's article I believe.

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Ok I have to ask this then; what could she be used for with a 600gr ball at 1500 fps???

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Just about anything, I imagine!!
With 'standard' soft lead ~1:20 alloy, great for large plains game or equivalent.
With properly hardened lead, all of the big five if history is any judge.

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At short range is the 577 still king of the hill Tony?

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Much of a muchness I reckon. Energy-wise, however, the 'historical' 5-dram spherical 12-bore produces a bit over 3000 ftlbs ME,
while the .577 in 'standard' N-for-B loading coughs up almost 4000 ftlbs.
Bullet weight is more than 100 grains heavier, too. That's a no-brainer IMHO, despite the experiences of the long-dead quoted above.
The 12-bore has greater cross-sectional area though, so would probably have a perceived advantage at 'in-your-face' distances,
and in heavier loads (requiring heavier rifles!) it will overtake the .577 at some point.
Personally, I love them both!

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A Tolley chart from the 1880s listed 1300fps for a 5 dram load and roundball, but it took almost 1500fps to uncross with Blue Dot

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'modern' black powder (especially Goex!) is around 10 percent less 'powerful' than the original stuff....
How about different brands of substitute?

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