Midway has 45 ACP + P brass seconds for $15/100 that turned out to be Speer with small primer pockets. Bought a couple boxes to make 400 Cor-Bon cases (uses SRP's), about half the price of the Starline 400 C-B brass. Started out using standard 45 ACP brass but would split after 2-3 reloads because of the higher pressure.I would also gather as much small pistol primer 45 acp brass as I could find. That saves swapping out primer bars. I like large primer better,(I’m old school) but plinking rounds , spp do just fine. I have a 550 c and load alot of 9 and 45.