.30 Caliber Bullet performance at 600 Yards for MV=2800fps
| Bullet, gr | Accuracy, Radius | Penetration |
| Ball M2, 152 | 7.5 inch | 11in, Oak |
| Tracer M1, 152 | 15 inch | Red trace 125-900 yds |
| AP M2, 165.7 | 10 inch | .3in, armor |
| Match M72, 175.5 | 3.5 inch | 11in, Oak |
| The M1C sniper rifle with M82 sight was reasonably effective from 400-600 yards, but not
beyond. With most of the Korean peninsula covered by a complicated array of hills and ridges,
much of the action necessarily took place between those ridges, especially after the war had
settled into a static defense of fortified positions. Using the M1903A1/Unertl combination,
Marine snipers registered a number of 1,000 yard kills, a very impressive improvement.
Nevertheless, in late 1951, the weapon was declared "Limited Standard" and replaced with the M1C, for many of the reasons the M1903A1 had been replaced with the M1.
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5th Marine Sniper in Punchbowl
M1903A1/Unertl, 1951
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Another difference in sniper action between the USMC and the Army was that Marine scout-sniper
teams often had a BAR for a support weapon. In street fighting, the BAR automatic fire would flush
the enemy out, and the sniper would finish him off.
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