Comparison of 6mm Thermos Bottle and 6mm Norma BR, with with 107 Sierra MKBT seated normally. While the 6mm BR is an unusually efficient case, the shorter and fatter 6mm TB will easily produce 10% more muzzle velocity, mostly due to a dramatic improvement in efficiency.
Just a sampling of the special and custom tools required to convert the 7.82 Lazzeroni Patriot case into the 6mm BR, it simply is not worth the effort! That is why we have been working so hard to get custom factory SMc cases made: 5mm/35 SMc cases should be available by October 2005 and 22/40 SMc sometime in 2006.
