Swapping black powder for smokeless rifle powder formula?

[sha]

Help me BP experts

Just curious really but if you had an old black power rifle or cartridges, can you substitute this for modern smokeless rifle powder reasonably easy?

Like is there something like XX grains of BP = XX grains of ADI 2208 or something like that?

Or am I barking up the wrong tree here?

[Noisydad]

YouTube CVA rifles. There's a video of BP muzzle loaders being blown apart by loading an equal volume of smokeless powder! There are older cartridge calibres than can be loaded BP or smokeless such as 32-20; 32-40; 45-70 to name just a few. BP cartridges MUST be filled with powder (sometimes even slightly compressed powder) or with wads to fill up any air space. Air space on top of BP equals pressure spikes that can bulge or burst barrels.

[Hardcast]

yep, you're barking up the wrong tree.

Very dangerous, not saying that modern B/P rifles can't be loaded with smokeless, but as far as any formular, no.
Firstly your B/P Rifle, Pistol or Gun must be proof tested for modern use. Most modern built ones are proof tested and say so. Even then, a black powder substitute is the prefered way to go.
Old originals are in no way strong enough to handle the pressure of modern powder.
Secondly, not sure why you would want to do it.
Yes there are plenty of modern rifles, made in Black powder calibes, 32.20, 32.40, 44.40, 45.70 that can and are loaded with smokeless powders.
The 44.40 lever action has been a popular pig gun for many to use, and the 45.70 has killed many larger animals.
I think many would argue that Smokeless powder relies more on pressure build up, hence the bottle neck case design, whereas most Black powder
designs are straight or only just tapered so as to release the gas quickly. Hence, black powder doesn't usually go well in bottle neck cases.

For me, stick to B/P in them.
Hope this helps.

[Redwood]

BP cartridges MUST be filled with powder (sometimes even slightly compressed powder) or with wads to fill up any air space. Air space on top of BP equals pressure spikes that can bulge or burst barrels.

I've never quite got my head around that.

With the small air space, the explosion moves too fast through the space to me let out or something? Is that the gist of it?

[bunnybuster]

DO NOT try to convert loading data for black to smokeless powder,use a reliable reloading manual/chart for smokeless powder in that

cartridge in the particular rifle you use,do it now before you blind yourself or blast your fingers off,not to mention your ear drums,Hmmmmm ?

BB.

[iwaslike]

DO NOT try to convert loading data for black to smokeless powder,use a reliable reloading manual/chart for smokeless powder in that

cartridge in the particular rifle you use,do it now before you blind yourself or blast your fingers off,not to mention your ear drums,Hmmmmm ?

BB.

So the formula is 'black powder divided by smokless rifles powder equals no fingers' ?

[Monty]

So the formula is 'black powder divided by smokless rifles powder equals no fingers' ?

That's a pretty universal formula in reloading if you make assumptions about such things

[Bourt]

That's a pretty universal formula in reloading if you make assumptions about such things

Well that's encouraging for people looking to get into the sport

[Hercl]

Well that's encouraging for people looking to get into the sport

Today's schedule.

12:30 Welcome new members.

1:00pm Shooting session.

1:45pm Lose a finger

2:00pm Lunch.

Come on down! Fun for the whole family

[sha]

Thanks all.

Not looking to do this myself so the fingers are just. Just an idea that popped into my head for some reason.