VictorLouis, I must take leave to differ - -
- - with
you, sir. You stated,
the original .357 Magnum loads that the N-frame was redesigned around. I'm talking about 158s in the 1,700fps+ range out of the 6" tube.
While I agree with your premise that
Most loading books of today contain no data approximating the ballistics of . . . .
the real Way-Back-When
Factory loads, they weren't quite THAT warm.
The original, advertised, velocities for the then-brand new .357 S&W Magnum cartridge ran 1510 to 1570 fps with a 158 gr. lead SWC
from an 8-3/8 inch barrel. This load was an absolute bear for leading, and sometime later Winchester began affixing gas checks to the base of their bullets. There was also a metal jacketed full metal jacket bullet with a small flat meplat sold as "metal piercing" or "metal penetrating," supposedly for anti-vehicle use. While this one made no pretense of expansion, it DID avoid leading pretty well. All of these were some HOT ammo.
Saxon Pig's mention of the 158/1400 load is right in line with my recollection of the rating current when I first begn taking ain interest in velocity figures, some time around 1962 or so. Really, when you think of it, this figure, if taken from a six-inch barrel, is not too great a step down from the original, late-1930s claims.
VictorLouis, I really don't doubt there were some handloaders who claimed to have reached velocities in the 1700 fps range. I just doubt they truly did it with 158s in a six-inch revolver barrel and shot many of those loads. Remember, the concept of common, privately owned chronographs is a fairly recent phenomenem. Sometimes, I muse that SOME of the reduction of velocity claims comes from a realistic assessment of the TRUE speed of some of the older loads. Another factor is that scientifically accurate pressure measuring devices were and are FAR more scarce than chronographs. Many, MANY "scientific hand loaders" cobbled up loads which, if they didn't Ka-BOOM and wreck the gun in the first 50 rounds, were passed around, printed someplace and became part of the handloading canon. (
) Recent testing of some of the "Old Standards" reveals that many were well up there in pressures, skating around the thin edge of metallurgical (and perhaps metaphysical) safety margins.
Best,
Johnny