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That is exactly what I am thinking .
True the 1917 45 acp ammo was jacketed ...
but the 357 magnum just about demanded a jacketed bullet with the pressure and velocity it developed .
Gary
While the 357 works very well with jacketed bullets it started out with lead ones and continued with lead into the 1960's before jacketed ones began to become common. Reading old gun magazine articles I've found much discussion of the problem of leading and poor accuracy in 357 revolvers with the factory standard 158 gr lead bullets that the ammo manufacturers used. General consensus being that factory lead bullets were too soft and handloaders of the era often went to harder lead alloys and gas checks to try to alleviate the problem. Some even began experimenting with swaging and forming various jacketed designs............ But the factories took a while before getting into the act themselves.
PS: I've shot a fair amount of the old factory 357 loads (they were still the most common load around in the 1970's) and the leading issue was very real! Still occasionally shoot odd bits of old factory ammo (partial boxes that I find mainly) and while some aren't bad, some still lead up a barrel in a hurry!
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