.172"4.4 mm
.17 HMR.17 WSM.17 Hornet.17 Rem
.224"5.7 mm
.223 Rem5.56 NATO.22-250.220 Swift.22 Hornet.224 Valkyrie.222 Rem
- .22 LR uses a slightly different .222–.223" heeled bullet
.243"6 mm
.243 Win6mm Creedmoor6mm ARC6mm Rem.240 Weatherby
.257"6.5 mm
.25-06.257 Roberts.257 Weatherby.25 Creedmoor.25 PRC
- Named ".25" but the bullet is .257"
.264"6.7 mm
6.5 Creedmoor6.5 PRC6.5×55 Swede.260 Rem.264 Win Mag6.5 Grendel
- Every "6.5" round shoots a .264" bullet
.277"7.0 mm
.270 Win.270 WSM6.8 SPC6.8 Western.277 Fury
.284"7.2 mm
7mm-087mm Rem Mag7mm PRC7mm WSM.280 Rem7×57 Mauser.280 Ackley
- Every "7mm" and the .280 shoot a .284" bullet
.308"7.8 mm
.308 Win7.62 NATO.30-06.300 Win Mag.300 WSM.300 PRC.30-30.300 BLK.300 Weatherby
- Nearly every American ".30" and ".300" round
.311"7.9 mm
7.62×39.303 British7.62×54R
- Russian and British ".30s" are .311–.312", not .308"
.338"8.6 mm
.338 Lapua.338 Win Mag.338 Federal.33 Nosler
.355"9.0 mm
9mm Luger.380 ACP.357 SIG.350 Legend
- .357 SIG and .350 Legend both use 9mm-size .355" bullets
- 9mm Makarov is NOT here: it's .363–.365"
.357"9.1 mm
.38 Special.357 Magnum
- ".38" Special is really .357"
.358"9.1 mm
.35 Whelen.35 Rem.358 Win
- Rifle .35s use .358", not the .355" of the .350 Legend
.375"9.5 mm
.375 H&H.375 Ruger.376 Steyr
.400"10.2 mm
10mm Auto.40 S&W
.429–.430"10.9 mm
.44 Magnum.44 Special
- ".44" is really .429–.430"
.451–.452"11.5 mm
.45 ACP.45 Colt.454 Casull.460 S&W.450 Bushmaster
- .450 Bushmaster shoots a .452" bullet, not the .458" of the .45-70
.458"11.6 mm
.45-70 Gov't.458 Win Mag.458 SOCOM.450 Marlin
⚠
Same bullet does NOT mean same ammo
Rounds that share a bullet diameter are not interchangeable. Firing the wrong cartridge can destroy your gun and seriously injure or kill you or anyone near you.
Only shoot the exact cartridge stamped on your barrel.
Bullet diameter is the measured size of the bullet itself. Same-size bullets can still differ in weight, length and construction, so check your twist rate and published load data when handloading.