9mm 115 vs 124 vs 147 Grain: Which to Buy

Buy 115 grain for the range, 124 grain for carry, and 147 grain if you shoot suppressed. That's what most 9mm buyers on GunPartPicker do, and the price per round backs it up.

The short answer

115 grain is the lightest common 9mm bullet and the fastest. It's the cheapest weight to shoot, and it's what about half of our 9mm buyers pick.

124 grain is the NATO weight. In range FMJ it costs almost exactly what 115 does. It's also the most bought weight for defensive hollow points.

147 grain is the heavy one. It leaves the muzzle at about 1,000 fps from a pistol, under the speed of sound, so it's quieter through a suppressor.

CCI

CCI Blazer Brass 9mm Ammunition, 115 GR FMJ, Brass Cased, Boxer Primed, Reloadable, Non-Corrosive, Product #5200 - 50 Round Box

In stock

$13.99 at KY Gun CompanyCompare 8 stores+ Add to build

Federal

Federal P9HS1 Premium 9mm Hydra-Shok Jacketed Hollow Point 124 GR - 20rd Box

In stock

$25.99 at KY Gun CompanyCompare 9 stores+ Add to build

Winchester

Winchester Ammo SUP9 Super Suppressed 9mm Luger 147 GR Full Metal Jacket - 50rd Box

In stock

$18.99 at KY Gun CompanyCompare 8 stores+ Add to build

Which weight buyers pick

115 grain leads by a wide margin, and almost all of it is range ammo. 124 grain is the most bought weight for defense. 147 grain is the smallest group, and a big share of those buyers pick a load built for suppressors.

Speed and recoil

From Federal's American Eagle line, a 115 grain FMJ leaves a 4 inch barrel at about 1,180 fps. A 124 grain runs about 1,150 fps. A 147 grain runs about 1,000 fps.

Recoil is where opinions split. Momentum is bullet weight times speed, and by that math a 147 grain load pushes back about 8 percent harder than a 115. The difference is in how it feels. Many shooters describe 115 as snappy and 147 as a slower, softer push. You'll find people who swear by each.

If you're not sure, buy a box of each and shoot them side by side. At about 33 to 40 cents a round for range ammo, it's a cheap test.

Shooting suppressed

The speed of sound is about 1,125 fps at sea level on a mild day. Anything faster cracks as it breaks the sound barrier, and no suppressor can remove that crack.

At about 1,000 fps, 147 grain stays under it from a pistol. That's why loads like Winchester Super Suppressed exist. Winchester lists it at about 990 fps.

115 and 124 grain loads usually run faster than sound, even from a pistol. From a pistol caliber carbine with a 16 inch barrel, they'll run faster still. If you shoot a suppressed carbine, 147 grain is the weight to buy.

Cold weather and high altitude lower the speed of sound. A 147 grain load that's subsonic in summer at sea level can creep over it on a cold day in the mountains.

Defense loads by weight

For carry, all three weights come in good hollow points. 124 grain is the most bought defensive weight in our data, led by Federal Hydra-Shok.

Defense ammo costs more. In our feeds this week, 124 grain defensive loads ran a median of about 98 cents a round, while 115 and 147 grain defensive loads ran about 65 to 67 cents. Whatever you carry, run enough of it through your gun to trust it.

Our best 9mm ammo guide has the full picks for range, carry and bulk.

Will it hit where you aim?

Switching weights can move your point of impact. A heavier, slower bullet spends a little longer in the barrel while the gun is already starting to recoil, so in many pistols 147 grain hits slightly higher than 115 at the same aim point.

At 7 yards the shift is small. At 25 yards you'll see it. If you carry 124 or 147 grain hollow points, practice and zero with the same weight so your dot or sights match what's in the gun.

Red dot shooters should confirm their zero with their carry load, not just their cheapest range box.

What about +P?

+P means the load runs at higher pressure than standard 9mm, so it's faster for the same bullet weight. You'll see +P versions of all three weights, mostly in defensive hollow points.

Most modern 9mm pistols are rated for +P. Check your gun's manual before you shoot it. Expect more recoil and more wear if you shoot a lot of it, and keep standard pressure ammo for practice.

Price per round by weight

In range FMJ, the three weights cost nearly the same. 115 grain runs a median of about 33 cents a round, 124 grain about 34 cents, and 147 grain about 40 cents.

That gap is small enough that you should pick the weight for the job, not the price. The cheapest boxes in our feeds run about 26 to 28 cents a round for all three.

How we pick

Weight shares count 9mm loads with a stated bullet weight that our users clicked through to buy or added in the Ammo Finder, counted once per person, from July 1 to November 4, 2026. Prices are the median in stock price per round across every merchant feed we track for the week to November 4, with listings dropped where the title's round count disagrees with the catalog. Velocities come from Federal's American Eagle 9mm data, measured in a 4 inch test barrel, and Winchester's Super Suppressed listing.