I don't think I've seen an answer to this question in any rules edition; the current rules for reloading ammunition are in Campaign Operations (pg. 209) with a reference to TO:AR (pg. 181). Are SRM and LRM reloads interchangeable between weapon sizes? In other words, when buying and stocking ammunition for these weapons, does the specific weapon size (SRM-2 versus SRM-4 versus SRM-6 for example) need specification? (Does the ammunition represent a supply of individual missiles or some form of prepackaged multi-missile rounds?)