4.1--4.2 grain of unique or 3.4--3.5 grains of bullseye under any 147 FMJ have been standard loads for many many reloaders for 20 years or better, for macs/uzis/mp-5/stens on FA with various cans. lots still use bullseye cause 3-1/2 grain per bullet makes an 8lb keg seem endless. get a dillon 650/ an 8lb keg of bullseye/2-3K berrys plated or zero 147 FMJ and knock yourself out.
I've been loading Bullseye since the early 1980s when it was made by Hercules back then. I had one of the original Dillon RL 450s with original STEEL primer cups that was upgraded to plastic/nylon slip fingers after I whacked/detonated
the primer magazine -NOT recommended
. I will NOT lose my patientce if the slide return hangs EVER again. Plastic parts puleez.
My 29 year standard 45ACP load for my Sionics can and Powder Springs is the obligatory Bullseye at 4.5 grains with 230 super hard cast slugs. Since I don't have a 9mm can but several MGs, the Walther MPK and especially the MP 40 just love the 147 grain slugs and Bullseye. Their load was 3.5 grains. Candy, Candy Candy all day for them.
The nifty thing about the Bullseye is that the burn rate is fairly fast and the pressure curve is pretty sharp (limits quickly) that it increases the cyclic rate(bolt speed) but keeps the velocities manageable with my 45 load at about 775 fps. Really perks up the action of the MP40 and the Powder Springs cyclic rate is snappy super brisk. A near satisfactory performance for my low tech boolit squirter and clunker can. The 9mm velocity should be even higher with more pressure and lighter ala heavier sub slugs.
I concur that the Bullseye goes a long way since the 9mm 3.5 grain fills a whopping 2 cases per pound and my standard 45 at 4.5 grain loads over 1500 rounds per case. Twenty bucks a pound, meters consistently and clean burning for a quickie burn powder. Also, if You want more velocity, try Blue Dot but the recoil is a lot stiffer as the cyclic rate slows down. For me, Bullseye is my favorite but there may be others better to do.
I've had good luck then with the Dupont IMR powders now known as IMR powders- specifically it was Dupont SR 5726 I think back then. The old reloading manuals have old forgotten recipes and the powder amounts have tapered down over the years for increasing liability. My old Hornady manual is a favorite and Sierra the same.
Been quite a while. SR equals small rifle. Like 4227. Comparable. But still Bullseye rules
Just been using Bullseye for an exceedingly long time and it ALWAYS works.