When the 5.56mm FMJ strikes a target at itsoptimal velocity, it yaws, tumbles, and breaks apart at the cannelure. The cannelure is the corrugated circumferential groove on the shank of the bullet to which the cartridge case crimps. For the purposes of fragmentation, the cannelure weakens th...
the two bullets are also of slightly different diameters. The .38 Special has a .357-inch diameter bullet, and the .380 ACP has a .355-inch diameter bullet. Neither one is .38 in diameter… Go figure!
A hole or passage made by or as if by use of a drill. Bore A hollow, usually cylindrical chamber or barrel, as of a firearm. Bore The interior diameter of a hole, tube, or cylinder. Bore The caliber of a firearm. Bore A drilling tool. Bore One that is wearingly dull, repetitive...
The root diameter is the minor diameter of an external thread and the major diameter of an internal one. Shoot To engage in hunting or the firing of weapons, especially for sport Is shooting in Scotland during the fall. Root (arithmetic) Of a number or expression, a number which, when ra...
For these reasons, case capacity for the two cartridges is similar, but the 6.8 SPC usually has a tiny bit more powder capacity than the 6.5 Grendel. Each cartridge also uses different diameter bullets: .264″ for the Grendel and .277″ for the SPC. ...
I asked each shooter what bullet and muzzle velocity they were running, and did some analysis on that. Here is the typical muzzle velocity the shooters were running in the top 6mm cartridges. (Note: Most these guys run a 26″ barrel.) One last interesting point is that I asked each shoo...