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Message: <blockquote data-quote="tburdett" data-source="post: 1432350" data-attributes="member: 4714">Rifle plates will only take a few rounds before they become ineffective.  Two rounds in the same location will defeat a rifle plate.  I don't know if this level of detail is important for your game.The numbers that you use reflect fairly accurately the stopping power of an undamaged rifle plate.This does not seem to be correct.  Are you confusing the (russian) 7.62 x 39mm with the (russian) 7.62 x 54mm?  The latter round would be very similar to the 7.62 x 51mm (nato), but the former is significantly weaker.A comparison between the rounds that you mentioned, the 7.62 x 51mm (nato) and the 7.62 x 39mm (russian), follows.The muzzle velocity of these two rounds would be similar (a few hundred feet per second advantage for the x51mm at the muzzle, increasing to an advantage of about 500 fps for the x51mm at 500 yards).The energy (in ft/lbs) at the muzzle is considerably different.  The x51mm round has almost 75% more energy at the muzzle, and that advantage increases to about 100% at 100 yards.  It gets worse the farther the bullet travels.  At 500 yards the x51mm round holds an almost 3 to 1 advantage in retained energy.This is primarily due to the difference in weight between the two rounds.  The x51mm round usually weighs in at 180 grains versus the usual 125 grains of the x39mm round.Hope this is helpful.</blockquote>