| Huvius |
| (.416 member) |
| 28/02/09 02:50 AM |
|
Re: 12-bore 2.5" fully rifled 10lb 2oz-should have posted here!
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Quote:
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.
How about different brands of substitute?
I have loaded some 500/450 with Shockey's Gold to try (haven't got out to shoot yet)and have replicated the original BP load which they advise to do - 100gr.
When they say to use the BP equvalent, am I then replicating a 10% reduced modern load over the original?
Have those with bore doublerifle experience here found that they have to slightly exceed the original load to regulate with modern powders?