6 mm caliber

This article lists firearm cartridges which have a bullet caliber between 6 mm (.236 in) and 7 mm (.284 in).

• Length refers to the cartridge case length.
• OAL refers to the overall length of the cartridge.

All measurements are in mm (in).

Pistol cartridges

Name	Bullet	Length	Rim	Base	Shoulder	Neck	OAL
.25 ACP	6.375 (.251)	15.62 (.615)	7.67 (.302)	7.06 (.278)	N/A	7.06 (.278)	23.11 (.910)
6.5 mm Bergmann	6.706 (.264)	-	-	-	-	-	-

Rifle cartridges

Up to .243in (6.1mm)

Name	Bullet	Length	Rim	Base	Shoulder	Neck	OAL
.243 Win	6.1722 (.243)	51.9404 (2.0449)	12.0091 (.4728)	11.9608 (.4709)	13.82 (.544)	7.0104 (.276)	68.8289 (2.7098)
6 mm Remington (.244 Remington)	6.185 (.2435)	56.72 (2.233)	11.99 (.472)	11.96 (.471)	10.89 (.429)	7.01 (.276)	71.76 (2.825)
.240 Apex .240 Magnum Rimless .240 Magnum Flanged H&H 240 Apex .240 Belted Nitro Express	6.223 (.245)	63.25 (2.49)	11.86 (.467)	11.43 (.450)	10.24 (.403)	6.96 (.274)	81.53 (3.21)
6 mm PPC	6.172 (.243)	38.48 (1.515)	11.30 (.445)	11.20 (.441)	10.95 (.431)	6.654 (.262)	53.34 (2.100)
6 mm BR Remington	6.1722 (.243)	-	12.0091 (.4728)	10.3911 (.4091)	-	6.9596 (.274)	-
6 mm XC	6.1722 (.243)	48.2092 (1.898)	11.8872 (.468)	11.8364 (.466)	-	6.8834 (.271)	71.3232 (2.808)
.243 WSSM	6.1722 (.243)	42.42 (1.670)	13.59 (.535)	14.1 (.555)	13.82 (.544)	7.39 (.291)	59.94 (2.360)
.240 Weatherby Magnum	6.18 (.243)	63.40 (2.496)	12.00 (.472)	11.50 (.453)	10.40(.429)	6.90 (.272)	80.00 (3.10)
.244 H&H Magnum	6.223 (.245)	-	-	-	-	-	-

.25in (6.5mm)

Name	Bullet	Length	Rim	Base	Shoulder	Neck	OAL
.25-20 Winchester	6.55 (.258)	33.78 (1.33)	10.36 (.408)	8.86 (.349)	8.46 (.333)	6.96 (.274)	40.44 (1.592)
.25-35 Winchester	6.55 (.258)	51.89 (2.043)	12.85 (.506)	10.73 (.422)	9.26 (.365)	7.15 (.282)	64.77 (2.55)
.250-3000 Savage	6.553 (.258)	48.46 (1.912)	12.01 (.473)	11.91 (.469)	10.51 (.414)	7.26 (.286)	63.88 (2.515)
.257 Roberts	6.553 (.258)	56.72 (2.233)	12.01 (.473)	11.99 (.427)	10.92 (.430)	7.36 (.290)	70.49 (2.775)
.25-06 Remington	6.541 (.2575)	63.35 (2.494)	12.01 (.473)	11.94 (.470)	11.20 (.441)	7.37 (.290)	82.55 (3.250)
.256 Win Magnum	6.528 (.257)	32.54 (1.281)	11.18 (.440)	9.677 (.381)	9.347 (.368)	6.528 (.257)	40.39 (1.590)

.264in (6.6mm) and up

Name	Bullet	Length	Rim	Base	Shoulder	Neck	OAL
6.5 x 50 SR Arisaka	6.705 (.264)	50.39 (1.984)	11.84 (.466)	11.35 (.447)	10.59 (.417)	7.34 (.289)	-
6.5x55 mm Krag 6.5x55 Swedish	6.7 (.264)	54.864 (2.16)	12.192 (.480)	12.17 (.479)	10.688 (.420)	7.468 (.294)	80.010 (3.15)
6.5 x 68	6.70 (.264)	75.02 (2.956)	13.00 (.512)	13.30 (.524)	12.18 (.480)	7.60 (.299)	86.50 (3.408)
6.5-284	6.70 (.264)	(2.170)	(.473)	(.500)	(.475)	(.295)	(3.110)
.260 Remington	6.70 (.264)	51.7 (2.035)	12.0 (.473)	11.9 (.470)	11.5 (.454)	7.5 (.297)	71 (2.8)
6.5 mm Creedmoor	6.70 (.264)	48.8 (1.924)	12.01 (.473)	11.9 (.470)	11.7 (.459)	7.54 (.297)	71.6 (2.82)
6.5x47mm Lapua	6.70 (.264)	47 (1.9)	12.01 (.473)	11.95 (.470)	11.53 (.454)	7.41 (.292)	-
6.5 mm Grendel	6.70 (.264)	38.7 (1.524)	11.2 (.441)	11.14 (.439)	10.87 (.428)	7.44 (.293)	57.5 (2.264)
6.5 x 52 mm Carcano	6.807 (.268)	52.50 (2.067)	11.42 (.450)	11.42 (.45)	10.85 (.427)	7.52 (.296)	-

See also

• 2 mm (.079 in) - 3 mm (.118 in) - 4 mm (.157 in) - 5 mm (.197 in) - 6 mm (.236 in) - 7 mm (.276 in) - 8 mm (.315 in) - 9 mm (.354 in) - 10 mm (.394 in) - 11 mm (.433 in) - 12 mm (.472 in) - 13 mm (.5118 in)
• List of cartridges by caliber
• List of handgun cartridges
• List of rifle cartridges