Actually Ike, that's true if all other factors are equal. A bore obstruction or a poorly maintained firearm... proofing can't help,
Yulzari,
All of the proofing houses are certified by an international agreement when dealing with modern cartridges, however they do not adhere to the same proofing standards when it comes to black powder.
The standard that is being applied by those who tout Pedersoli, is the Italian standard, which is 140% of a main charge and a single projectile. The German, Belgium, and British standards are much higher in powder and use a double projectile. (IIRC) the German and or Austrian standard has two tests before final proofing is valid.
Plus from what many have written on many forums, the understanding of what proofing does, and what it does not do, is lacking. Proof testing does show that the barrel held that proofing house's charge and projectile, when the barrel left the proofing house. It has zero bearing on how the barrel is cared for over the years. And all of the proof houses have had barrels sent for re-testing, known as re-proofing, that have failed. So folks that think that a Pedersoli is superior because it has been proofed, but attend events where the interior of the musket barrels are not inspected..., are fooling themselves. I inspected two Pedersoli's on October 27th..., and neither were safe to fire due to internal barrel pitting, although externally, they appeared in very good condition.
What the owner of the two muskets should do to satisfy those who tout proofing, would be to replace the barrels with new, proofed barrels, OR he could send the guns to Italy for reproofing (or could send them to Birmingham England for a higher proofing test). He may fire his own proof load, and then have the barrels measured and then magnafluxed. Since nobody is going to question the already proofed barrels, this is probably what he will do. If he does nothing, nobody will know, as nobody checks musket barrels for improper care at target or living history events...
Nothing is stopping folks from loading their Indian Bess with 170 grains of 2Fg (IF you use 120 grains as the 100% load), and a wad, and a .735 ball, then firing it..., and then having the barrel measured for bulges and having the barrel examined with Magnetic Particle Inspection (magnafluxed) for cracks, etc.... assuming it doesn't blow. This would equal Italian proofing. However, many of the folks who tout proofing demand it be done from an actual "internationally certified" proof house... even though there is no standard for black powder muzzleloaders in the international certification.
Nothing is stopping folks from sending their Colerain musket barrels to a proof house, or doing their own proofing as mentioned above. American black powder barrels are not proofed, and neither were the Japanese barrels. And before somebody chimes in with "The American Barrels are higher quality steel", while that is true, ALL black powder barrels in England and Germany, which are of equal steel to the American barrels are proofed. So are American barrels when they are imported...
In July of 2013, a series of imported musket barrels was tested, and the results were:
"We have tested the following barrels using the old English standard of a triple charge double ball load
the barrels are measured at room temperature with a micrometer at 3" intervals starting at the breech face.
we have tested various barrels from a number of makers and national origins with only 2 failures out of almost 200 barrels
neither of the barrels that failed was Indian
one was an unmarked straight octagon barrel that blew out it's breech plug
the other one was an Armisport Enfield barrel that split just ahead of the breech. in fairness both of the failures were on used barrels that had been volunteered for this test and they were both pretty badly neglected
In the case of both failures, neglect and corrosion appear to be the major cause of the failures."
Now I don't know if the person conducting the test has sufficient capabilities to do a valid test, and they have yet to magnaflux the suviving barrels for micro cracks, but it does bear out the problem with poorly cared for barrels, reagardless of having been proofed.
LD