21-29 MM CALIBRE CARTRIDGES

 

METRIC DESIGNATION	RIM DIAMETER	NATIONALITY	PROJECTILE	VELOCITY	NAME / WEAPONS
23 x 106	29.0	DK	HET / 175	725	1930s Madsen a/c
23 x 115	27.0	SU	HEI / 175	740	WW2 NS-23, NR-23, GSh-23, GSh-6-23 a/c
23 x 122	34.5	F	HE / 200	900	WW2 HS 406, 407 a/c
23 x 133	31.5	CH	HE / 160	1,050	1960s HS 827 afv
23 x 139 SR	30.9	USA	?	823	WW2 .90" T-4 a/c
23 x 152B	33.4	SU	HE / 185	900-970	WW2 VYa (brass) a/c, 1950s ZU (steel) AA
23 x 260	15.0	SU	HEI / 174	885	1960s Rikhter R-23 a/c
24 x 138	31.4	CH	AP / 225	900	Pzw.Kan 38, TB.41 Tankbüchse ATR
24 x 138 B	27.0	D	?	?	WW2: necked-up 20 x 138 B
25 x 39 B	27	USA	HEAB / ?	?	XM25 current exp grenade
25 x 59 B	27	USA	HEAB / 132	425	XM307 current exp grenade
25 x 87 R	31.5	UK	HE / 200	470	Vickers 1 inch, Vickers-Terni a/c, AA
25 x 87	30.2	I	HE / 200	440	FIAT Revelli M 1917 25.4 mm a/c
25 x 94 R	31.1	USA	AP / 206	470	19th C 1" Nordenfelt / 20th C Aiming Rifle
25 x 116 B	33.3	CH	?	?	1950s Swiss a/c
25 x 137	38.0	CH / USA	HEI / 180	1,100	1970s Oe KBA, M242 Bushmaster, GAU-12/U, GAU-22/A, 25M811
25 x 163	42.6	F / J	HE / 250	900	WW2 Hotchkiss Mle 1938, Type 96 AA
25 x 184	38.0	CH	HE / 250	1,160	1980s Oerlikon KBB, KBD AA
25 x 189	34.8	UK	HE / 260	914	1930s Vickers naval AA
25 x 187 R	42.0	S	?	?	version of 25x205 for Bofors m/38
25 x 194 R	47.2	F	AP / 320	960	WW2 Hotchkiss Mle 1934 AT
25 x 205 R	42.0	S	HE / 250	850	1930s Bofors m/32 AA
25 x 218 R	40.0	SU	HE /280	900	WW2 M1940 AA
25 x 218	34.8	SU / PRC	HE / 288	900	1950s 2-M3, 2-M8 AA
26 x 130	36.0	USA	HE-T / 195 APT / 118	945 1,265	1960s Colt Bushmaster AFV
27 x 70 B	29.4	USA	HE / 250	610	1950s T150 Vulcan a/c
27 x 96 B	29.4	USA	HE / 200	840	1950s Vulcan a/c
27 x 145 B	34.0	D	HE / 260	1,025	1970s Mauser BK 27 a/c, naval
27 x 173	44.0	D/CH	F / 255	1,180	1990s Mauser Score tank gun spotter
28 x 187 R	47.9	D	AP / 131	1,400	WW2 PzB 41 (Gerlich squeezebore: to 20 mm)
28 x 199 SR	43.5	USA	HE / 416	823	WW2 1.1" naval AA

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