Ok, just a couple to complete some knowledge gaps (there are many!):
a. why are factory ammo cases always filled almost fully with powder, when in contrast I reload and the powder only fills around 3/4 of the case? any particular reason they fill them so much when surely they could save money on more moderate loads that are equally accurate?
b. with an Ackley Improved, you gain a small % case capacity, unless you're loading the case to the rim (figure of speech), what is the benefit? say, if you're ultimate load only takes up 3/4 of the case, does the AI shoulder make ANY difference? Also, would a 'full' load not be dangerous in most cases (no pun intended),etc...you catch me drift.