Quote:Forged steel are use for action of the pedersoli i wait to have confirmation of the steel use for barrel
.
Source: Dick Trenk, former Pedersoli US Match Director before his death Pedersoli barrels are machined from a chrome moly alloy having the metalurgical composition called 30Cr Mo4 Uni 7845 which is a patented alloy variation developed by Mauser in the 1930s specially for their new M34 light machinegun which has such a rapid rate of fire. The alloy was designed to prevent or minimize the barrel from "walking" the bullets on the target as the barrel heated up. To my knowledge only Mauser, Sako, Mannlicher and Walther use this expensive alloy which Pedersoli buys.
For our action frames ( and other parts such as breech blocks etc.) we use a special alloy which is best suited for the "forging" process we use on ALL our Sharps, Rolling Block, Trapdoor, Colt Lightning and forthcoming HiWall rifles.
This alloy is identified as being 18Cr Mo4. This alloy alows what is called "cementation hardening." Which gives a hard wear resistant surface of proper depth, while maintaining a non-brittle softer internal molecular structure necessary on such parts which are subject to shock and high stress loadings repeatedly.
This alloy also allows us to produce very colorful case hardened exterior surfaces so desired in fine guns. The alloy can also be finished in standard hot blue/black or "coin" color finishes.
Smaller parts are made from equally suitable steel alloys and are properly heat treated by means of induction coil methods and oil or water quenched, according to the desired hardness and type of alloy being used.
Pedersoli approves 29.000 psi loadings with BP or
smokeless powders.
This is correct and official for our Sharps, Trapdoor and Rolling
Block models.
All these guns are proof tested at about 33,000 to 35,000 psi using American Federal brand smokeless ammo , at the Italian national Proof House in Gardone Italy.
Properly loaded with correct garde BP you will not exceed allowed safe limits but under certain conditions FFFg powder has been known to exceed the limits a bit.
For the 45 and 50 caliber rifles FFFg has no safe usage.
It burns too fast and makes faster MV speeds but accuracy is down the drain.
The 45-70 and 45-90 work best with FFg, 1.5Fg grain sizes. The 45-110 and 45-120 hold lots of powder and the 45-110 likes 1.5Fg while the 45-120 really should only use Fg.