Problem - the shorter the barrel, the lower the velocity, and 5.56x45mm bullets' major wounding mechanism is yaw followed by violent fragmentation, which generally only occurs above a "magic velocity" of, if I remember right, around 2500 fps.
Below this velocity the bullet just enters, turns a bit, and that's it. Above it, you get horrific devastation, at least with a properly-designed all-lead bullet with a mid-bullet cannelure that forms a weak spot where the bullet can break (e.g. M193 or equivalent ammo).
When you have a short barrel like the one pictured, you're likely to never exceed 2500 fps at any useful distance from the barrel, so stopping power is severely reduced. Stick with 16-inch or better for 5.56x45mm weapons, and with the proper ammo type, to get extreme stopping power.
I'm not personally into the short barrels, so I never looked into what the best calibers/rounds are for them. So, I'm not the best guy to ask. Find a short-barrel fan and I'm sure they can suggest stuff.
Problem - the shorter the barrel, the lower the velocity, and 5.56x45mm bullets' major wounding mechanism is yaw followed by violent fragmentation, which generally only occurs above a "magic velocity" of, if I remember right, around 2500 fps.
Below this velocity the bullet just enters, turns a bit, and that's it. Above it, you get horrific devastation, at least with a properly-designed all-lead bullet with a mid-bullet cannelure that forms a weak spot where the bullet can break (e.g. M193 or equivalent ammo).
When you have a short barrel like the one pictured, you're likely to never exceed 2500 fps at any useful distance from the barrel, so stopping power is severely reduced. Stick with 16-inch or better for 5.56x45mm weapons, and with the proper ammo type, to get extreme stopping power.
References: see Martin Fackler, et al.
Would you please suggest an "Other" sbr-type proper config? What caliber would be useful or rather more so than 300 Blk or 556?
I'm not personally into the short barrels, so I never looked into what the best calibers/rounds are for them. So, I'm not the best guy to ask. Find a short-barrel fan and I'm sure they can suggest stuff.
thx