07-08-2011, 11:58 PM
JASmith Wrote:You likely wouldn't do a linear scale -- let the length be long enough to get 95-105 grains and you're good to go!It just happened that a linear scale down makes a .284" bullet that gives a cartridge OAL of 2.5 inches, the length for which Murray designed the 7mm UIAC. As scaled, it also would keep only the boattail extending into the powder space.
For the smaller calibers, 6.5mm and 6.8mm, I agree the bullet can be lengthened. However, I don't know if 95-105 grains is heavy enough to give the desired terminal performance. Again, we need some testing, testing...
Quote:BTW Non-concur on statement that "US is locked in on M855A1 style" -- it just happens to be the current fad.I wouldn't use "fad" to describe it, but I didn't mean they were locked in forever. But, they are clearly determined to use that bullet type for the foreseeable future.
Quote:Hopefully it won't last as long as the M80!It'll last until there is a perceived need to replace it, and/or a leadership that pushes for a change.