.22 Spitfire

.22 Spitfire

Infobox Firearm Cartridge
name= .22 Spitfire


caption=
origin= USA
type= Rifle
service=
used_by=
wars=
designer=Melvin J. Johnson
design_date=1963
manufacturer=Johnson Guns Inc.
production_date=
number=
variants=
is_SI_specs=
parent=
case type=rimless bottleneck
bullet=.224
neck=.253
shoulder=.332
base=.353
rim_dia=.356
rim_thick=
case_length=1.29
length=1.65
rifling= 1:14
primer= Boxer large rifle
is_SI_ballistics=
bw1=40
btype1=
vel1=2850
en1=720
bw2=40
btype=
vel2=3000
en2=795
bw3=50
btype3=
vel3=2700
en3=810
bw4=
btype4=
vel4=
en4=
bw5=
btype5=
vel5=
en5=
test_barrel_length=
balsrc=Barnes & Amber

The .22 Spitfire (also known as 5.7mm or MMJ-5.7mm) is a American rifle cartridge.

Designed by Melvin M. Johnson of Johnson Guns Inc. for their conversion of the M1 carbine, [Barnes, Frank C., ed. by John T. Amber. "Cartridges of the World" (Northfield, IL: DBI Books, 1972), p.127.] this wildcat [Barnes and Amber, p.127.] was introduced in 1963. It was based on the .30 carbine, necked-down to .22 (5.7mm). [Barnes and Amber, p.127.]

It is suitable for rabbits, coyotes, or other varmints, [Barnes and Amber, p.127.] and has potential as a military round. [Barnes and Amber, p.127.]

It became available commercially, but was never popular.fact|date=August 2008

ee also

*List of cartridges by caliber
*List of rifle cartridges
*5 mm caliber

References

ources

*Barnes, Frank C., ed. by John T. Amber. "MMJ-5.7mm", in "Cartridges of the World", pp.127 & 143. Northfield, IL: DBI Books, 1972. ISBN 0-695-80326-3.


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