Czechoslovakian 1987 7.62x54r Steel Core Light Ball
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This ammunition was made for export to other Eastern Bloc countries.  This particular lot uses a ball powder that was experimental in Czechoslovakia at the time of production.  Other lots with typical extruded powder have been reported but not confirmed.

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(Reference number 020)

Case Over all Length Powder
Headstamp Material Coating Water Volume Min. Max. Weight
"bxn" (factory) over "87" (year) steel copper wash 66.0 gr. 3.014" 3.019" 49.2 gr.

 

Bullet
Dia. Length Weight Style Core Tip Color Magnetic? Ballistic
Coefficient		 Sectional
Density
.311" 1.268" 148.5 gr. spitzer boat tail steel none yes 0.428 0.219

 

Package
20 rounds per cardboard box 800 rounds per wooden case
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Measured Muzzle Velocity in Feet per Second (10 shot string)
Rifle M44 M28 M91/30 M91 (Finnish) M91 (Russian)
Low 2628 2633 2759 2788 2721
High 2678 2798 2815 2840 2785
Average 2648 2722 2794 2819 2761
Extreme Spread 50 165 56 52 64
Standard Deviation 19 44 20 18 21
Trajectory and Drop Graph
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Notes on the graphs  The graphs above each represent two sets of data.  The red line is the path of the bullet fired from the rifle with the sights zeroed at 200 yards.   The bullet exits the muzzle at a distance a fraction of an inch below zero inches.   This represents the height of the sight over the centerline of the bore.  The bullet rises above zero in a trajectory that then passes through zero again at 200 yards and continues downward.  The blue line is the the bullet drop in inches for the distance traveled.  This begins at the muzzle at zero inches and decreases with distance not taking sight height or zero distance into account.

 

Trajectory Comparison Graph
This graph combines the trajectories of the 5 graphs above to compare the performance of the test rifles.
Click on the graph for a large, scalable PDF to zoom in for better detail clarity.  Adobe Reader required.

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Bullet Velocity to 500 yards in Feet per Second
Distance (yds) 0 50 100 150 200 250 300 350 400 450 500
M44 2648 2544 2443 2344 2248 2153 2061 1971 1883 1798 1717
M28 2722 2617 2514 2414 2315 2220 2126 2034 1945 1858 1774
M91/30 2794 2687 2583 2481 2381 2284 2188 2095 2004 1916 1830
M91 (Finnish) 2819 2712 2607 2504 2404 2306 2210 2116 2025 1936 1849
M91 (Russian) 2761 2655 2551 2450 2350 2254 2159 2067 1977 1889 1804

 

Bullet Energy to 500 yards in Foot Pounds
Distance (yds) 0 50 100 150 200 250 300 350 400 450 500
M44 2304 2127 1961 1805 1660 1523 1396 1277 1165 1063 969
M28 2435 2251 2077 1914 1761 1619 1485 1360 1243 1134 1034
M91/30 2566 2373 2192 2022 1863 1713 1574 1443 1320 1206 1100
M91 (Finnish) 2612 2416 2232 2060 1898 1747 1605 1472 1347 1231 1123
M91 (Russian) 2505 2316 2138 1972 1815 1669 1532 1404 1284 1172 1069

 

Recoil
Rifle M44 (Soviet) M28 (Finnish) M91/30 (Soviet) M91 (Finnish) M91 (Russian)
Weight (Pounds) 8.25 lbs 9.75 lbs 8.56 lbs 9.50 lbs 9.38 lbs
Recoil Velocity (Feet per Second) 10.7 fps 9.3 fps 10.9 fps 9.9 fps 9.8 fps
Recoil Energy (Foot-Pound) 14.7 ft-lb 13.1 ft-lb 15.8 ft-lb 14.5 ft-lb 14.1 ft-lb
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