6.8mm Remington SPC
NDIA Small Arms Symposium Las Vegas
May 11, 2004PRESENTED BY GREG DENNISON
SENIOR RESEARCH ENGINEERREMINGTON ARMS COMPANY, INC
6.8mm Remington SPC
6.8mm Rem SPC – 115 gr Sierra HPBT6.8mm Rem SPC – 115 gr Hornady OTM5.56mm NATO – 77 gr Sierra HPBTMK5.56mm NATO – M855, 62 gr FMJ
6.8mm Remington SPCBrief History Developed by Remington using internal funds 6.8mm Remington SPC cartridge developed to
provide increased lethality and better long range capability than current 5.56mm NATO or 7.62x39 through higher energies
Shell body diameter is larger than 5.56mm NATO but smaller than 7.62x39
Cartridge length same as 5.56mm NATO Modular approach of M16 weapons family allows use
of 6.8mm Rem SPC cartridge with dedicated upper receiver and magazine
6.8mm Remington SPCSpecifications Available with 115 gr Hornady Open-tipped match
(OTM), 115 gr Sierra HPBT Match and 115 gr FMJ Muzzle velocity of 2800 ft/s from a 24” barrel, 2625
ft/s from 16” barrel and 2475 ft/s from a 12” barrel 1 MOA dispersion typical Chamber pressure is 55,000 psi MAP via conformal
transducer 28 rds of 6.8mm Rem SPC – 115 gr OTM weighs
~1.06 lbm 30 rds 5.56mm NATO – 62 gr FMJ weighs ~0.76 lbm 20 rds 7.62mm NATO – 150 gr FMJ weighs ~1.07 lbm
6.8mm Remington SPCPerformance Comparisons – Velocity vs. Range
2900
2625
2750
2365
1000
1200
1400
1600
1800
2000
2200
2400
2600
2800
3000
0 50 100 150 200 250 300 350 400 450 500 550 600
Range (yds)
Ret
aine
d V
eloc
ity (f
t/s)
5.56mm NATO - 77 gr HPBTMK
5.56mm NATO - M855 62 gr FMJ
6.8mm Rem SPC - 115 gr Hornady OTM
7.62mm NATO - 150 gr FMJ
7.62x39 - 123 gr FMJ
6.8mm Remington SPCPerformance Comparisons – Trajectory vs. Range
100 yd zero
-106
-118-122-123
-193-200
-180
-160
-140
-120
-100
-80
-60
-40
-20
0
0 50 100 150 200 250 300 350 400 450 500 550 600
Range (yds)
Tra
ject
ory
(in)
5.56mm NATO - M855 62 gr FMJ
5.56mm NATO - 77 gr HPBTMK
6.8mm Rem SPC - 115 gr Hornady OTM
7.62mm NATO - 150 gr FMJ
7.62x39 - 123 gr FMJ
6.8mm Remington SPCPerformance Comparisons – Wind Drift vs. Range
10 mph wind at 90*
79
56514946
0
10
20
30
40
50
60
70
80
90
0 50 100 150 200 250 300 350 400 450 500 550 600
Range (yds)
Def
lect
ion
(in)
7.62x39 - 123 gr FMJ
7.62mm NATO - 150 gr FMJ
5.56mm NATO - M855 62 gr FMJ
6.8mm Rem SPC - 115 gr Hornady OTM
5.56mm NATO - 77 gr HPBTMK
6.8mm Remington SPCPerformance Comparisons – Energy vs. Range
1212
2519
540
933
1759
465
1178
332
636
1527
293
573
1158
2580
500
1000
1500
2000
2500
3000
0
50
100
150
200
250
300
350
400
450
500
550
600
Range (yds)
Ret
aine
d E
nerg
y (ft
-lbf)
7.62mm NATO - 150 gr FMJ
6.8mm Rem SPC - 115 gr Hornady OTM
5.56mm NATO - 77 gr HPBTMK
7.62x39 - 123 gr FMJ
5.56mm NATO - M855 62 gr FMJ
6.8mm Remington SPCTerminal Performance at 50 yds
6.8mm Rem SPC – 115 gr OTMFrom 16” barrel Barrett Upper, velocity@12’ = 2608 ft/s
5.56 NATO - M855From 18” barrel, velocity@12’ = 3071 ft/s
6.8mm Remington SPCTerminal Performance at 50 yds
6.8mm Rem SPC – 115 gr OTMFrom 16” barrel Barrett upper, velocity@12’ = 2608 ft/s
5.56 NATO – 77 gr Sierra HPBTMKFrom 18” barrel, velocity@12’ = 2760 ft/s
6.8mm Remington SPCTerminal Performance at 50 yds
6.8mm Rem SPC – 115 gr OTMFrom 16” barrel Barrett Upper, velocity@12’ = 2608 ft/s
5.56 NATO - M855From 18” barrel, velocity@12’ = 3071 ft/s
6.8mm Rem SPC – 115 gr OTMFrom 16” barrel Barrett upper, velocity@12’ = 2608 ft/s
5.56 NATO – 77 gr Sierra HPBTMKFrom 18” barrel, velocity@12’ = 2760 ft/s
6.8mm Remington SPCTerminal Performance at 25 feet
6.8mm Rem SPC – 115 gr OTMFrom 12” barrel Barrett upper, velocity@12’ = 2445 ft/s
5.56 NATO - M855From 14” barrel M4, velocity@12’ = 2900 ft/s
6.8mm Remington SPCTerminal Performance at 25 feet
6.8mm Rem SPC – 115 gr OTMFrom 12” barrel Barrett upper, velocity@12’ = 2445 ft/s
5.56 NATO – 77 gr Sierra HPBTMKFrom 14” barrel M4, velocity@12’ = 2613 ft/s
6.8mm Remington SPCTerminal Performance at 25 feet
6.8mm Rem SPC – 115 gr OTMFrom 12” barrel Barrett upper, velocity@12’ = 2445 ft/s
6.8mm Rem SPC – 115 gr OTMFrom 12” barrel Barrett upper, velocity@12’ = 2445 ft/s
5.56 NATO – 77 gr Sierra HPBTMKFrom 14” barrel M4, velocity@12’ = 2613 ft/s
5.56 NATO - M855From 14” barrel M4, velocity@12’ = 2900 ft/s
6.8mm Remington SPCSummary 6.8mm Rem SPC can be used with existing M16/M4
lowers with dedicated upper receiver and magazines 6.8mm Rem SPC offers higher energy for improved
down range performance versus 5.56mm NATO and 7.62x39
Terminal performance in gelatin has been illustrated at 25 feet with short barreled weapons and at 50 yds with intermediate length barreled weapons 115 gr Hornady OTM provides for greater and more
immediate temporary expansion cavity 6.8mm Rem SPC has been submitted to SAAMI