Anyone have links to articles or studies related to SBR effectiveness (with expanding rather than fragmenting ammo), range, accuracy, etc? My new admin isn't a huge fan of SBRs and appears to be looking to change our policy. That said, it appears he'll consider otherwise if provided with documentation that would support SBR use. Obviously, I have offered to demonstrate my personal SBR's abilities but it's a sample of one. I've found some stuff but the vast majority of testing done/documented on the subject has been by anonymous posters on places like m4carbine.net and ar15.com. I doubt that will fly, regardless of the quality of the information. Help a brother out! I'm happy to provide an email address via PM if anyone has stuff saved in PDF or whatever. Documentation of your own department's testing would be awesome if anyone is willing to share; I'll provide my creds and anything gathered will only be used internally at my agency.