The Annoyed Man wrote:RogueUSMC wrote:http://www.defensivecarry.com/forum/defensive-rifles-shotgun-discussion/197337-interesting-chrono-results-300-blackout-10-5-16-barrels-whisper-ammo.html
Only lose about 10% muzzle velocity between a 16" barrel and a 10.5" barrel...
That’s the primary reason I chose a 10.5” barrel for my .300 Blk SBR. According to the reading I did before buying, the cartridge is more or less optimized for that length - whether you’re shooting subs or supers. I had originally considered a 10.5” 5.56 barrel for an SBR.....and may do one yet, now that the SBR is already registered....but then I started investigating .300 Blk, and decided to do that caliber instead.
Same here... anything over 10.5 is 5.56 for me, under is .300BLK. I'm in the planning stages of a new post-Vegas super-compact pistol build right now.