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Originally Posted by m21sniper
Well accurately measuring the wind and range is the whole trick, isn't it?  |
Yeah, and at that range, being off by 50 yards on the range call, or 1 mph on the wind can be a miss by several feet.
Quote:
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I wonder what the bullet drop is for a .338 lapua at 1.5 miles. It's probably about 50 feet, lol.
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I bet it was more than that.
I don't have access to my ballistics calculator at work, but a while back I ran the numbers out to 1000 yards for a .338 Remington Ultra Mag for a buddy who was looking for a long range elk rifle, using the Sierra 250 gr Gameking at 2900 FPS.
At 1000 yards, with a 300 yard zero the .338 RUM has about 20 feet of drop and about 5 1/2 feet of windage in a constant 10 MPH 90deg crosswind.
If you miss the range by 50 yards, and it is really 950 instead of 1000, you missed by 3 feet.
Keep in mind, this is at "only" 1000 yards. The shots we are talking about were 2700 yards.
Now the 338 RUM has slightly less velocity than the Lapua, plus I believe The Lapua uses heavier bullets with a slightly higher BC, so it should be a little better than this, but not much.
Someone want to run the numbers?
JBM Ballistics