Try page 12 here: http://www.dtic.mil/ndia/2008Intl/Roberts.pdf
For LE Patrol use, where there is a high incidence of potential engagements around or involving vehicles, ammunition that is able to effectively penetrate intermediate barriers, particularly vehicle glass is critical. The best LE 5.56 mm/.223 loads for intermediate barrier penetration are the 62 gr Federal bonded JSP Tactical (LE223T3) and the similarly performing 55 gr Federal bonded JSP load (Tactical--LE223T1 or identical Premium Rifle--P223T2). The Winchester 60 gr JSP Nosler Partition (Q3283) load is the current FBI .223 load; in addition to the Winchester product, Black Hills also does a very nice loading of the 60 gr Nosler Partition. The Swift 75 gr Scirocco bonded PT is also a good choice. Another option would be the Hornady 62 gr JSP TAP Barrier load, although it suffers a bit against glass compared to some of the other loads. The Barnes all copper TSX bullets are great projectiles and offer good penetration through barriers, however, when first hitting a laminated automobile windshield intermediate barrier, the TSX bullets exhibit less expansion than a TBBC, as the Barnes jacket either collapses at the nose, the jacket "petals" fold back against the core, or the "petals" are torn off. This phenomena has been documented by the FBI BRF, as well as being noted in our testing. We are also in the process of testing the new 64 gr Speer Gold Dot JSP and the new 62 gr Remington bonded JSP loads, as they show good promise. None of the .223 OTM bullets, even the heavy 75 - 100 gr loads, offer acceptable performance through automobile windshield glass. FWIW, contrary to what many believe, 62 gr M855 FMJ is also not very good against glass. For military use, the M995 AP is the best choice for vehicles and glass.
Keep in mind, that with non-fragmenting bullet designs, heavier bullet weights are not necessarily better, especially at closer ranges and from shorter barrels. As long as penetration and upset remain adequate, it is possible to use lighter weight non-fragmenting bullets and still have outstanding terminal performance. With fragmenting designs, a heavier bullet is ideal, as it provides more potential fragments and still allows the central core to have enough mass for adequate penetration. In addition, heavier bullets may have an advantage at longer ranges due to better BC and less wind drift.