Post by benny123 on Aug 12, 2016 0:34:00 GMT -5
Last night I read an article written by gunrwriter and gumsmith, John Ross. Title was something like" Development of the big bore 500 S&W Magnum". As I should be taking receipt of a rifle chambered in 500 S&W shortly, I was imterested on the reloading aspects of the article. He summarizes his history and that of those who revisted larger six gun cartridges and firearms to increase performance and the efficiency. It's well written, is interesting , and I recommend it.. But, I'm hoping you guys are either familiar with it, his work, or can muse on some aspects,of his findings.
It seemed like it was an epiphany that once he Increased the overall case length of the .500S&W to end of cylinder( by designing bullets with crimp-to-nose lengths of .700) he chartered new performance levels. Or, maybe exposed the faults of traditional case preparation in this caliber. With typical slower burning pistol powders and less shank in the case, he could reach a maximum of the 60K psi spec of the cartridge .,I dont remember the exact performance gain if you followed his instruction, but pretty certain it was , e.g, a 200fps advantage with a 400 or maybe 500 grain bullet., at that weight, the speed increase is significant
I can find and read it a little slower this weekend but I wanted to ask for help. I always,viewed the increased case capacity of a cartridge as a way of reducing pressure relative to a shorter case , but not necessarily as a way to reduce pressure and increase performance I,got the impression that an immediate gain in performance could be had safely for any large-frame-housed cartridge that allows ffor a longer COAL
I got a long day tomorrow but will try to find the article again and post a link within 24h
8/12: forgot that I had to be crafty in finding this article. Others alluded to it on various forums but I had to find it in the internet's trash can. That being said, the author may have intended to take it down. Based on circumstances, if there's specific load data, don' follow it
web.archive.org/web/20150426113419/http://john-ross.net/pdfs/maghist.pdf
It seemed like it was an epiphany that once he Increased the overall case length of the .500S&W to end of cylinder( by designing bullets with crimp-to-nose lengths of .700) he chartered new performance levels. Or, maybe exposed the faults of traditional case preparation in this caliber. With typical slower burning pistol powders and less shank in the case, he could reach a maximum of the 60K psi spec of the cartridge .,I dont remember the exact performance gain if you followed his instruction, but pretty certain it was , e.g, a 200fps advantage with a 400 or maybe 500 grain bullet., at that weight, the speed increase is significant
I can find and read it a little slower this weekend but I wanted to ask for help. I always,viewed the increased case capacity of a cartridge as a way of reducing pressure relative to a shorter case , but not necessarily as a way to reduce pressure and increase performance I,got the impression that an immediate gain in performance could be had safely for any large-frame-housed cartridge that allows ffor a longer COAL
I got a long day tomorrow but will try to find the article again and post a link within 24h
8/12: forgot that I had to be crafty in finding this article. Others alluded to it on various forums but I had to find it in the internet's trash can. That being said, the author may have intended to take it down. Based on circumstances, if there's specific load data, don' follow it
web.archive.org/web/20150426113419/http://john-ross.net/pdfs/maghist.pdf
