Have you considered using the Federal paper hulls? They are perhaps the largest volume paper hull still readily available. Generally speaking, large hull volume makes for easier to load low pressure loads. How may rounds do you load as low pressure for Damascus? If you cannot source any in your area and the requisite quantity is not too great, PM me w/a physical addy and I'll send you some gratis. Once fired paper Fed hulls are good for two reloads with smokeless at normal pressures. A third loading, while sometimes possible is usually best not bothered with. Paper hulls also smell correct after firing, much better than the plastiques;-) Stick to published data, there is plenty around or contact the powder mfg. directly and ask what they have pressure data for using their powder and the Fed paper hulls.
BTW, hull volume in the old & new AA 12's is the same, so I wouldn't get overly concerned with sorting. The new ones crimp a bit better and the old ones last a bit longer, that's my take on the dif.
Kind regards,
tw
