Yes but your just saying 900 FPS or 1000 FPS loads are Proof loads.
Your not looking at the CUP which is the important thing.
And my Webley is Adapted like lots were to shoot 45 Colt you are not reading my entire posts i guess.
But keep going on about 455 Proof loads.
455 is a shorter case than the 45 schofield or 45 colt.
The only Cylinders Keith blew up were ones he Rechambered leaveing the cylinder walls to thin, like makeing a 44 Special into a 45 Colt Ect. and some Double powder Loads in another.
If i was useing Unique to get the 1000 FPS load i would agree with you 100%
BUT im useing 2400 which has a much lower presure curve and thats what Keith was useing to.
Just going by the FPS is pointless. Its what presure your creating to get the FPS that counts.
Theres other smokeless powders like 5744 there guys in Canada shooting +800 FPS Loads with 256 Gr Keith bullets in the 44 Russian.
5744 has a even lower presure curve than 2400.
I would not put it past some Colt or S&W Seller in the USA to Blow up a surplus English made Webley on purpose that at the time were cheep like Borsh so more people would be Scared into buying the S&W and old Colts!
I have seen alot of guys shoot diffrent loads in Canada in Webley MKVIs and i never seen even one that had a Buldged Chamber never mind Blowin up and entire gun.
Reaming a chamber slightly deeper so it can take a longer case dont weaken the Cylinder. Them MKVIs have long Chamber throats.
If you made the side walls thinner then yes its weaker.
A longer case like a 45 Schofield or 45 colt spreads the presure over a larger area. Puts the Bullet closer to the forceing cone increases accuracy.
Id bet money my MKVI cylinder is as strong a cylinder as ANY Triple lock S&W in 45 colt.
In any case i dont give a rats ass what anyone else does.
I enjoy my guns the way i like.
Saying what im doing is Dangerous without knowing Exactly what im doing or knowning the difrence between the presure created with diffrent gun powder is just Fear Mongering!