I remember the thrill as a teenager getting old cars that hadn't run in 20 years going again. I get the same kick out of old milsurps. My recently acquired Dutch Beaumont M71/78 might not have been touched off in decades. It was easy (a 3/10 in difficulty) getting her fired up again.
Take Starline 50-90 brass
- trim to 2.100"
- anneal
- size down in an 8mm Lebel F/L die
- neck with 45 Colt sizer
- trim to 2.040"
Take 32.0 grs of H4198 and a 310gr cast bullet sized to 0.454" (groove size) to an OAL of 2.490". Gave me 1530 fps - a nice mild Springfield Trapdoor load at about 18K psi.
The brass is now fireformed to the chamber, and not surprisingly for these old girls, the chamber is very "generous" - almost no neck. Next time I will set the case length longer at 2.100" +/- to get a bit more neck to size.
L to R - 11x52R Beaumont, 50-90 Sharps
Take Starline 50-90 brass
- trim to 2.100"
- anneal
- size down in an 8mm Lebel F/L die
- neck with 45 Colt sizer
- trim to 2.040"
Take 32.0 grs of H4198 and a 310gr cast bullet sized to 0.454" (groove size) to an OAL of 2.490". Gave me 1530 fps - a nice mild Springfield Trapdoor load at about 18K psi.
The brass is now fireformed to the chamber, and not surprisingly for these old girls, the chamber is very "generous" - almost no neck. Next time I will set the case length longer at 2.100" +/- to get a bit more neck to size.
L to R - 11x52R Beaumont, 50-90 Sharps
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