Nine-millimeter ammunition takes first place in a recent American retailer study. Its lead will surprise very few people who follow shooting sports. Further down the list, newer cartridges challenge familiar names. Some older rounds also have more loyal buyers than expected. Here is what the latest numbers actually tell us.
Three Cartridges Account for Most Rounds Sold
In October 2026, Lucky Gunner reviewed fifteen years of customer purchases. Its leading categories were 9mm, the combined .223 Remington/5.56 NATO group, and .22 Long Rifle. Together, those three accounted for 71% of all rounds sold. Expand the count to ten categories, and the share reaches 93%. Beyond those ten, no individual cartridge exceeded 1% of rounds sold.
Such concentration deserves attention, but the source also needs context. We are examining one company’s transactions rather than a national census. You should remember hunters may buy fewer cartridges than weekly range visitors. Consequently, sales volume cannot tell us how many owners favor each chambering.
9mm Has Pulled Far Ahead of Other Handgun Cartridges
You can see the biggest change in the pistol market. In 2010, 9mm represented 36% of Lucky Gunner’s pistol rounds. The retailer now puts its share at approximately 75%. Its growth in market share largely leveled off around 2021.
Meanwhile, .45 ACP and .40 S&W have experienced a very different outcome. Combined, they represented 39% of pistol rounds sold in 2010. Their joint share now falls below 10% in the retailer’s figures.
You should not confuse market share with yearly growth in purchases. A cartridge can dominate an industry even during a broader sales decline.
Surprise One: .380 ACP Passes .40 S&W
You might miss an unexpected change within the five leading pistol categories. Back in 2010, .40 S&W ranked ahead of .380 ACP. Their positions have now reversed in Lucky Gunner’s customer data. The change is notable because the five leading handgun categories are otherwise unchanged.
Another detail deserves attention amid the 9mm discussion. Demand for .380 ACP and .38 Special has been comparatively steady since 2011. Their share did not collapse alongside the figures for .40 S&W. This suggests that smaller segments can endure while the market leader expands.
Surprise Two: .300 Blackout Overtakes .308 Winchester
For rifle buyers, the results provide a different kind of upset. Lucky Gunner says .300 Blackout passed .308 Winchester during 2026. For such a recent cartridge, the achievement is noteworthy. The retailer did not begin stocking .300 Blackout until around 2012.
You may expect an older hunting favorite to lead indefinitely. Instead, a newer chambering has earned a substantial slice of purchases. However, .308 Winchester has not suffered the same steep decline seen elsewhere. It has held roughly 6% to 9% of the retailer’s rifle rounds. The surprise concerns changing rankings more than disappearing demand.
Surprise Three: 6.5 Creedmoor Challenges an American Classic
Another modern cartridge has entered an especially crowded part of the market. Lucky Gunner now places 6.5 Creedmoor alongside .30-06 Springfield in fifth place among rifle categories.
Across the last three years, 6.5 Creedmoor represented approximately 1.5% of rifle rounds sold. A 1.5% share sounds modest beside the leading categories. The company stocked around 140 rifle cartridge types during 2026. It sold more 6.5 Creedmoor rounds than its bottom 124 rifle categories combined.
These figures show why small percentages deserve proper context. A specialist cartridge can attract a sizable customer base without approaching 9mm volumes.
Surprise Four: .30 Carbine Still Finds Buyers
Not every unexpected result involves a newly developed cartridge. The historic .30 Carbine reached eighth place among Lucky Gunner’s current rifle categories. Its association with the M1 Carbine makes this especially interesting.
The retailer connected past sales increases with military surplus availability. It highlighted periods around 2010 and 2020 as examples. Access to affordable surplus ammo can influence rankings independently of firearm fashion.
The .223 Family Keeps Its Enormous Lead
Among rifle cartridges, the combined .223/5.56 category is the clear leader. Its share has ranged around 65% to 75% of rifle rounds sold. Unlike the handgun story, this pattern has changed relatively little since 2010.
There is an important safety distinction hidden within this combined ranking. SAAMI advises against firing 5.56 NATO ammunition in firearms marked only .223 Remington. A verified military-specification 5.56 chamber can accept .223 ammunition, subject to manufacturer guidance. Similar cartridge names are never a substitute for checking markings.
Why 12 Gauge Can Beat .22 LR in Revenue
You get another surprise when a retailer measures dollars instead. Ammo.com placed 12 gauge third in revenue between September 2025 and August 2026. Its .22 LR category finished fourth during the same period. Lucky Gunner instead ranked .22 LR third by rounds sold. They simply measured different things across different customer groups.
The Market Is Bigger Than One Retailer’s Ranking
National Shooting Sports Foundation research estimated 17.7 billion commercial rounds sold during fiscal 2024. Handgun cartridges represented 46%, while rifle rounds accounted for 38%. Shotshells made up the remaining 16% of that total.
A separate NSSF-linked retail report gives us another warning. Among 492 consistently reporting dealers, ammunition package sales dropped 12.4% during 2025. Revenue fell 16.7%, and average prices were down 4.8%. Those figures measure packages rather than the number of individual cartridges.
So a leading position does not automatically mean rising purchases. You need the dates and measurement method before interpreting any ranking.
What Readers Should Take From These Numbers
Claims about the most popular ammo need three checks.
- Does the ranking count rounds sold or revenue received?
- Is the sample national or limited to particular retailers?
- Are closely related chamberings grouped despite having different technical specifications?
The answers help us compare reports without mixing incompatible statistics. Popular calibers also tell us little about safe compatibility with your firearm. Your firearm’s chamber marking and the manufacturer’s instructions take priority.
The Bottom Line
Nine-millimeter ammunition leads the retailer’s fifteen-year ranking by rounds sold. Yet the more interesting story involves the categories below it. The rise of .300 Blackout and 6.5 Creedmoor challenges assumptions about established rifle favorites. Meanwhile, .380 ACP and .30 Carbine show that older designs still attract buyers. These surprises make America’s ammunition market more varied than its leading sales figures suggest.