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Colonel Eduard Rubin and Colonel Rudolf Schmidt 
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Joined: 31 Mar 2009 11:37
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Post Colonel Eduard Rubin and Colonel Rudolf Schmidt
Colonel Eduard Rubin was director of the Swiss government federal ammunition factory and research center in Thun. He invented the full metal jacket bullet in 1882. The first European .30 calibre - GP90 7.5×53.5mm paper-patched cartridge in 1882. Supplied the .303 rimmed 1888 trials cartridge which was a version of the Rubin cartridge. Colonel Rudolf Schmidt and Colonel Eduard Rubin went on to design the straight-pull, 1889 Schmidt rifle and Rubin 7.5mm calibre cartridge. (Schmidt-Rubin)

09 Nov 2019 22:04

Joined: 31 Mar 2009 19:10
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Location: Eastern UK, Oregon USA and Ontario Canada
Post Re: Colonel Eduard Rubin and Colonel Rudolf Schmidt
Col Rubin actually spent time at the Royal Small Arms Factory, located at Enfield Lock in North London, and home of the Lee-Enfield rifle. It will come as no real surprise to learn that he had more than a passing interest in ammunition design, as noted above.

The similarity between the .303 British and the Swiss GP11 is not a coincidence - both are 174gr FMJ, and both are to be found in a similar size case. However, the Swiss cartridge is rimless, while the Brits, hanging around in a mire of indecision, kept to the rimmed case with all the problems that went along with charger loading in the correct order and a rapid-firing machine gun that was anything but.

Y'see, in order to shoot fast, the .303 round had to be removed backwards from the belt and inserted forward into the breech - a slow old way of doing things, whereas the rimless cartridge could be pushed straight on through a disintegrating link belt. Compare the slow chug of the Vickers medium machine gun, at 500 rpm, with the hair-raising German devices - the MG18 found in WW1 aircraft at 1200 rpm, and the horrendous MG34 and 42, similarly rapid.

24 Nov 2019 22:42
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