I never inferred that it did and guess I don't understand why comparing pressures of Ffg and Fffg blackpowder have anthing to do with this?
because granule size and shape have a whole lot to do with the pressure generated with even black powder . this is why a finer grain has a higher pressure rating for a lower charge .
we are also talking about a given pellet size . so say a pellet for a 54 being .530 or .535 .
if the pellet is made for a more modern weapon say like a CVA inline " just for instance , not saying thats what it is " with a bore size of .535 and not an older side lock with bores being + or .15 to .20 then if that bore is on the larger side ,you have a problem if the pellet does not crush but stacks with a projectile above it . Hence you now have created and air space around the pellets which is never a good idea in a charge
IMO this is why manufactures do not recommend them for all BP weapons across the board .
so if you look in it at the data for a .50 cal, 22", 1:24" twist barrel, you will see this is true in almost all instances,
This is according to my book loaded with Goex 3FF not a pellet ? Granted my book is not the newest but still not comparable to solid pellet charge .
Lyman data, 2 Pyrodex 50 grn pellets usually produces close to twice the pressure of 1 pellet.
once again we are not talking "usually" we are talking what do they produce for a given load and why pellets should not be recommended in weapons they are not designed for .
Markwell arms used to recommend no more the 85 grains of 3F in their rifles . for obvious reasons.
Pyrodex last I read only used one horn of the stuff now just for my paper shotgun shells
recommended reducing the charge by 10 grains compared to BP
So now thats down to 75 grains ?
Human nature being what it is if 2 pellets are good the 3 are better and suddenly pressures of multiple pellets become a very responsible question ..
After all we are not just talking breech pressure here but the capability of the nipple to stay seated with a given charge . The main spring to be able to hold the hammer without blow back . Even the tumbler and sear itself to be able to control that hammer when and if blow back happens , from coming off the lock and becoming a projectile .
No mater how you look at it there are just to many variables concerning their use when not recommended by both the weapons manufacture and the pellet manufacture .
Harryo and I I think are agreeing but just for different points of view here .
But what this all bils down to is folks , dont play the he said she said game or usually anything . Its not just your safety but the safety of those that may be un lucky enough to be standing around you when something bad just happens to take place .
never use anything in your muzzleloaders that are not specifically stated to be ok in your weapon . Just because something is on the market does not make it safe especially in older modern weapons .
And though we have not been talking about it .
For the record smokeless powder is never , ever a good idea in any muzzle loading weapon . NOTICE I said any and that includes the modern ones supposable designed for it as there still are some serious questions concerning them .
Play it safe , enjoy BP but remember these weapons are not toys and require the utmost respect .