Federal launched the 30 Super Carry in 2022 with a simple pitch: 9mm performance in a narrower package, so the same pistol holds three more rounds. Four years on, the ballistics half of that pitch holds up better than the commercial half.
A .312-inch bullet in a .827-inch tapered rimless case, standardized by SAAMI at 52,000 psi (SAAMI introduction). The 9mm Luger is rated at 35,000 psi, and that ceiling is how a smaller case still drives a 100-grain bullet at 1,250 fps. The bullet is .042 inch narrower, less than a dime's thickness, which is the whole source of the magazine advantage (Shooting Illustrated).
Both loads are Federal American Eagle full metal jacket, the cheapest practice ammunition in each caliber, solved with a 25-yard zero and a 0.5-inch sight height. Muzzle figures are factory advertised; downrange values follow from each load's published G1 ballistic coefficient.
| Load | Muzzle fps/ft-lb | 50 yd fps/ft-lb | 100 yd fps/ft-lb | Drop at 100 | BC |
|---|---|---|---|---|---|
| 30 Super Carry 100 gr | 1,250 / 347 | 1,130 / 284 | 1,043 / 242 | -8.4 in | .169 |
| 9mm 115 gr | 1,180 / 356 | 1,047 / 280 | 959 / 235 | -9.1 in | .120 |
The table does not say what most forum arguments assume. The 9mm starts with a 9 ft-lb edge; the 30 Super Carry does better at distance, holding 242 ft-lb at 100 yards against 235 with seven-tenths of an inch less drop. Sectional density explains it: 100 grains in a .312 bore is a longer, slicker bullet than 115 grains in .355, which is why its BC is .169 against .120. Inside 50 yards, where a defensive pistol is used, the two are indistinguishable. At 300 yards both are subsonic and dropping nine feet or more, which is academic; the same curves put the 30 Super Carry near 775 fps and the 9mm near 655. The logic scales to rifles, as in our 7mm Backcountry vs 7mm Rem Mag comparison, and it is why twist rate and bullet design matter before you pick a carry load.
Federal's FBI-protocol gel data has the 100-grain HST at 12 inches of penetration and .590 inch of expansion in bare gel, then 15.5 inches and .530 inch through heavy clothing; the 124-grain 9mm HST goes 13.1 inches at .650, then 14.5 inches at .570 (Federal data). Both expand, both land inside the accepted 12-to-18-inch window, and the 9mm makes a slightly wider hole. Independent Clear Ballistics testing behind a clothing barrier got 15.75 inches and .59 inch from the 30 Super Carry HST, against 18.46 inches and .62 inch for the 9mm, but only .39 inch from the 115-grain Gold Dot (AmmunitionToGo). Load selection matters more here than in 9mm. So does barrel length: that test measured 1,180 fps from the HST in a 3.8-inch barrel, not 1,250.
The Smith & Wesson Shield Plus holds 13 rounds flush and 16 extended, against 10 and 13 in 9mm, in an identical envelope. The Shield EZ runs 10 against 8, Nighthawk's 1911 pattern guns 12 against 10. A 17-round pistol the size of a Glock 43 is genuinely useful; nothing else in a production micro-compact matches that metric. If you are weighing it against a conventional micro nine, our Savage Stance XR review covers that size class.
From Federal's own store, same product line, same 50-round box: 30 Super Carry American Eagle 100-grain FMJ at $25.99, about 52 cents a round, against 9mm American Eagle 124-grain FMJ at $19.99, about 40 cents. Roughly 30 percent more for practice, and not a shortage premium. The catalog is thin too: four 30 Super Carry loads in total, and both defensive loads, the HST at $43.99 per 20 and the Punch at $29.99 per 20, show as currently unavailable. Smith & Wesson's webstore simultaneously lists the Shield Plus in 30 Super Carry as discontinued, while the Shield EZ still sells at $519. A carry gun you cannot reliably feed is a range toy with extra steps.
Less reciprocating mass shows up as roughly 3.5 ft-lb of free recoil in a compact pistol against 4.2 ft-lb for the 9mm, a real difference for a new or light-framed shooter. The trade is report: 52,000 psi through a small bore is sharp, and testers compare it to 5.7x28 mm. Double hearing protection indoors is not overcautious.
Buy 9mm if this is your first or only defensive pistol. Ammunition is everywhere, defensive loads are in stock, practice runs 40 cents a round, every holster and sight fits, and the terminal difference is a few hundredths of an inch of expansion. Buy 30 Super Carry if you already carry a 9mm you like, you have decided three extra rounds in the same footprint is worth real money, and you will buy 500 to 1,000 rounds of one lot today rather than trusting the shelf next year. Skip it if you want a cartridge with a growing pipeline of pistols and loads, because right now it has neither. If you buy online, arrange the transfer first: find an FFL dealer in Texas or your own state, and confirm the fee.