Originally Posted by
Dave1
When they went over to modern smoke less powder they found the metford rifling was to soft and wore quickly...
Yes, but the Metford rifling was designed to cope with the extensive fouling from the black powder.
It could be hard for a BP reloader to achieve a similar-performing loading to the original. The compressed BP was formed to a hollow cylinder with a flashhole up the middle, presumably to make sure the stuff all burnt before the bullet got away out the muzzle. With the greater energy density of 777, it might be more easily achievable.
IMO, Pyrodex is too vile a chemical assault to subject any valued antique rifle to. It's horrible and is a work of the Devil 
Women will not come within yards of you for days. And your barrel will rust off.
Regards,
MikB
...history... is, indeed, little more than the register of the crimes, follies, and misfortunes of mankind. (Edward Gibbon: Decline and Fall of the Roman Empire)
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