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The following charts were calculated using Speer Gold Dot 55 grain 223 Remington ammunition. Although there are many loads available to law enforcement agencies, this load was chosen because it is the load used by our local agencies.

These energy comparison charts were calculated using the following data in our Oehler ballistics program:

Elevation: 2000 feet 10.5” barrel velocity, 1-7 twist: 2575
Temperature: 75 degrees 14.5” barrel velocity, 1-7 twist: 2850
Humidity: 15% 16.0” barrel velocity, 1-7 twist: 2900
Barometric pressure: 29.85

Kramer Defense “DEMO” Program

Law enforcement agencies interested in evaluating the 6.8 x 45mm Urban Combat Cartridge may request a complete upper receiver group through our “Demo Upper” program. These complete upper receiver groups (URG’s) are available is several different configurations and barrel lengths, ammunition is not provided. This program is available to federal, state, and local law enforcement agencies and is subject to component availability.

Contact us at demo@kramerdefense.com for further information. Please provide a contact name, title, unit, organization or department and phone number.


Kramer 6.8 x 45mm 10.5" vs 223 Remington 10.5"
Range In Yards Muzzle 100 200 300 400 500 600
6.8 x 45 UCC Energy Advantage 66% 80% 98% 120% 144% 166% 178%
Kramer Carbine 10.5" (6.8 x 45mm UCC) 1351 1115 912 741 600 487 400
223 Rem 10.5" (Speer LE 55 Gr. GDSP) 810 617 460 337 246 183 144


Kramer 6.8 x 45mm 16" vs 223 Remington 16"
Range In Yards Muzzle 100 200 300 400 500 600
6.8 x 45 UCC Energy Advantage 55% 66% 79% 98% 119% 143% 165%
Kramer Carbine 16" (6.8 x 45mm UCC) 1596 1326 1093 894 726 588 477
223 Rem 16" (Speer LE 55 Gr. GDSP) 1027 799 608 452 331 242 180


Kramer 6.8 x 45mm 16" vs AK-47 16"
Range In Yards Muzzle 100 200 300 400 500 600
6.8 x 45 UCC Energy Advantage 10% 19% 30% 43% 54% 60% 58%
Kramer Carbine 16" (6.8 x 45mm UCC) 1596 1326 1093 894 726 588 477
AK-47 16" (7.62mm x 39mm) 1445 1107 835 625 471 366 302


223 Remington 16" vs AK-47 16"
Range In Yards Muzzle 100 200 300 400 500 600
AK-47 Energy Advantage 40% 38% 37% 38% 42% 51% 68%
AK-47 16" (7.62mm x 39mm) 1445 1107 835 625 471 366 302
223 Rem 16" (Speer LE 55 Gr. GDSP) 1027 799 608 452 331 242 180