Lets try this again an see if it collapses my phones browser as I try to hit publish.
Our armorer wants to replace our 13 year old 14.5" Colt M4A1's with 11.5" guns. I've researched the net and Docs stickies but haven't found this exact answer. We use Fed LE 223T1 with the 55grn TBBC now. As these are Swat guns our needs are for a bullet that performs out of the 11.5" barrel preferably out to between 100-200 yards. I will define performs as acceptable expansion at velocities produced from an 11.5" gun at a minimum of 100 yards but ideally beyond that somewhat but not more than 200 yards is needed. Performance through auto glass and similar intermediate barriers is required at say 75 yards or less.
Anyone know what the minimum velocity is required for LE223T1 to perform so that I can determine the max effective range of our current ammo if we went to 11.5" guns? What load gives us the best compromise of performance against intermediate barriers plus the "mostest" distance with the bullet still performing in a people medium? FBI load, 77 grain OTM?
I'm not personally set on 11.5 or 14.5 but I dont want an MP5 sized gun that is only good out to 70 yards on people. I also have to be able to articulate this argument.