I'm looking for the cleanest burning powder for 9mm loads for my (gas operated) H&K P7.
This is the ultimate cause. Guns with barrels that fully enclose the case head do not have this problem.The [URL="The propellant AA#5 [See Annotation #1] has been identified in a disproportionate number of kB!s, not only in Glocks but USP40s with barrels which do provide full case support.
first time that i have head this about aa5 powder. but anyway i use after market barrels when i shoot reloads and cast lead in my glocks. no matter the cal, 9mm, 40, and 45, they all get the kkm barrel treatment. the glock factory barrel are not good for reloads/cast lead.The propellant AA#5 [See Annotation #1] has been identified in a disproportionate number of kB!s, not only in Glocks but USP40s with barrels which do provide full case support. A number of Glock-L members have reported kB!s involving this propellant. It is not clear whether these kB!s are the fault of the propellant or the reloader, but it is clear that they are occurring in disproportionate numbers. As early as Fall '92 a source inside Glock, Inc. told Speir on background: "A lot of the blown up Models 22 and 23 we've been seeing has involved Accurate Arms #5… and damned if we know why."