Thread: Gun Porn
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Old 03-13-2012 | 05:20 AM
  #67  
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BoilerUP
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The chart didn't format well, but you are likely reading the chart correctly.

The ballistics for most <200gr 30cal bullets suck, and the 308 simply doesn't have the horsepower (especially in factory ammo) to make it go faster which would reduce drop & drift.

Example: Federal Premium - Rifle Details
The 150gr Federal Power-Shok has 2820fps at the muzzle. With a 100yd zero you're looking at 3.9" drop @ 200yd and 14.7" @ 300yd.

Now look at the ballistics of a 150gr Nosler Ballistic tip; same weight bullet, same speed, but better ballistic coefficient:
Federal Premium - Rifle Details

All that said, drop & wind drift is highly dependent on your ASL elevation and density altitude. A bullet fired at 3000' ASL will drop & drift less over a given distance than a bullet fired at sea level.

Most hunters sight their rifle in 1" or maybe 2" high @ 100yd; that should give you a "max point blank range" (which basically means you hold on the vitals of a whitetail at any range and the bullet will impact the vital zone without holdover or adjusting scope elevation) in the 250-300yd ballpark.

175gr Federal Gold Metal Match is *similar* to the M118LR round that military snipers use...look at those ballistics:

Federal Premium - Rifle Details
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