Best 5.7x28mm Ammo 2026: 7 Range & Defense Loads Ranked

5.7x28mm is a small-diameter, high-velocity centerfire cartridge that drives a light 27-40gr bullet at 1,700-1,900 fps from a pistol, trading raw energy for a flat trajectory and very low recoil. FN developed it in the late 1980s as a PDW round to defeat soft body armor in military hands, but the civilian loads sold today are ordinary lead, polymer-tip, and aluminum-core bullets built for range and defense, not the armor-piercing military variants.

Against 9mm the tradeoff is direct. Factory 5.7 produces roughly 220-290 ft-lbs of muzzle energy from a pistol, under a typical 9mm's 350-420 ft-lbs, so 9mm hits harder and costs a fraction as much per round. What 5.7 buys with its velocity is a near-flat trajectory to practical pistol distances, far softer felt recoil, and a 20-23 round magazine. That package is why the round exists: it is easy to shoot fast and accurately, which suits recoil-sensitive shooters and high-capacity home-defense guns. It is not a cheaper or more powerful 9mm.

The caliber comparison people reach for is wrong in both directions. 5.7x28mm is not a 5.56 NATO equivalent; 5.56 is a larger rifle cartridge with two to three times the energy. And it is not a rimfire: its case length is close to .22 WMR, but it runs at far higher pressure and energy with a centerfire, reloadable brass case. Think of it as a purpose-built high-velocity pistol and PDW round. Once you have the ammo sorted, our rifle builder lets you spec a 5.7 pistol or carbine host to run it.

The FN DFNS SS200 (30gr JHP, ~$0.81/round) is the best overall 5.7 carry load: it is FN's own defensive design, and FN states it meets the FBI test protocol and was independently tested. Running 1,894 fps and 239 ft-lbs from a pistol, it is the fastest mainstream defensive load, trading a little momentum for velocity and the flattest trajectory of the carry options.

The Speer Gold Dot (40gr bonded GDHP, ~$0.80/round) is the load that first answered the caliber's terminal-performance question. Its Uni-Cor bonded core holds the jacket to the lead so the bullet retains weight through barriers, and at 1,800 fps and 288 ft-lbs it carries more momentum than the lighter FN load. DFNS versus Gold Dot comes down to what feeds and groups in your pistol: velocity and expansion geometry (FN) against bonded weight retention (Speer).

For reliable expansion through heavy clothing, the Hornady Critical Defense 40gr FTX runs 1,810 fps and 291 ft-lbs, the heaviest-hitting mainstream defensive bullet in the caliber. Its Flex Tip polymer insert drives back on impact to initiate expansion, resisting the clogging that causes plain hollow points to plug and fail after passing through heavy clothing or denim. The catch is packaging: it ships in 25-round boxes, pushing per-round cost to about $1.04, the top of the 5.7 defensive band. Whichever you carry, function-test a box or two first, then keep the rest as carry ammo and train on cheaper FMJ.

Fiocchi Range Dynamics (40gr FMJ, ~$0.45/round) is the cheapest way to feed a 5.7 pistol. Sold in 150-round bulk packs sized for real range days, it undercuts every brass-case FN load and is the practical choice for shooters who want to train with their 5.7 rather than ration it. It is a clean-burning, reloadable-brass plinking load at 1,700 fps, with no terminal design; range use only.

FN SS197SR (40gr Hornady V-Max, ~$0.76/round) is FN's standard sporting and range load, and the V-Max reference cartridge most shooters use to function-test a 5.7 pistol. FN GUNR SS201 (40gr FMJ, ~$0.61/round) is FN's current-production factory FMJ, the value pick when supply stability matters: because FN makes both the cartridge and the guns, GUNR tends to stay on shelves when third-party 5.7 dries up. Both run 1,700-1,738 fps from a pistol and climb past 2,000 fps from a PS90 carbine on reloadable brass.

For indoor ranges that ban lead, FN SS195LF (27gr lead-free HP, ~$0.86/round) is the pick. Its jacketed aluminum core and lead-free primer make it non-toxic, and at 1,890 fps it is the fastest mainstream lead-free 5.7 load, with a nearly flat trajectory and the softest recoil in the caliber. Confirm you are buying SS195LF and not the green-tip SS198LF, which FN restricts to law enforcement and military. Even the cheapest 5.7 runs roughly double bulk 9mm; for cross-caliber context on what range ammo should cost, see our best 9mm range ammo guide.

Velocity and energy figures are manufacturer data from a pistol barrel unless noted. A PS90 or carbine barrel adds roughly 240-350 fps depending on the load. Cost per round reflects verified 2026 street pricing at the box sizes each load ships in.

Key takeaway: The lightweight 27-30gr loads (SS195LF, DFNS) win velocity and flat trajectory; the 40gr loads (Gold Dot, Critical Defense) carry more downrange momentum. No mainstream 5.7 load clears 9mm-premium pricing on the range, and the FMJ practice loads (Fiocchi at $0.45, GUNR at $0.61) are where a 5.7 shooter's ammo budget actually goes.

No civilian 5.7x28mm load meets the federal armor-piercing definition, which turns on a projectile core made of hardened metals like steel or tungsten. FN's hardened-penetrator loads, SS190, the SS191 tracer, and SB193, are restricted to military and law enforcement and are not sold to civilians. The confusion traces back to the round's 1980s PDW origins, when those military variants were designed to defeat soft armor. What sits on a retail shelf is different, but the legal classification and real-world performance are two separate questions.