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Posted: 1/9/2004 2:24:30 PM EDT
| typical bullet velocity of 223 55gr & 62gr out of a 18inch barrel? 1 in 8 twist (not sure if that matters) |
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FWIW, Remington rates its 55gr UMC FMJ round at 3,240 fps out of a 24" test barrel. They also estimate that in the 3000 - 3500 fps range, each inch of barrel length counts for about 30 fps change in muzzle velocity. So for an 18" barrel, or 6 inches shorter than their test barrel, subtract 6 x 30 or 180 fps, or about 3,050 fps at the muzzle. Of course, as one member says, your mileage may vary! |
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