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Posted: 9/24/2012 6:10:01 PM EDT
| I know the ACOG scopes are callibrated for certain weight projectiles for certain length barrels (usually 62 gr. out of either 14.5, 16, or 20" barrel, I believe). In general, which caliber BDC would closest match a commerically loaded 77 gr. .223 round out of an 18" barrel? 5.56 or the .308? |
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Quoted:
I know the ACOG scopes are callibrated for certain weight projectiles for certain length barrels (usually 62 gr. out of either 14.5, 16, or 20" barrel, I believe). In general, which caliber BDC would closest match a commerically loaded 77 gr. .223 round out of an 18" barrel? 5.56 or the .308? I have a TA33 which is calibrated for 62gr bullets. Out of my 18 inch upper, if I zero with 75s at 400 meters, it is within +-2 inches out to 500 meters. And I think it is something like 4 inches low at 600 meters. Meaning I zero with the 400 meter stadia at 400 meters, and deal with the very slight offset at different ranges. |
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