Loose Primer Pockets may be the result of to Hot a loading. Reduce the powder charge for this thin web brass. IMO. http://www.ar15.com/forums/t_6_42/276154_Current_American_Eagle__223_once_fire_brass.html&page=1 When using the homemade tool, under .175" web thickness is said to be unsafe when shooting FC brass with small letter headstamps make around 2000. Current 2013 production is said to be OK. Measurement is taken from head to web. Depth of the primer pocket can also be measured to adjust web measurements. .183" to .187" is the Old NATO standard when taking a measurement with the tool.