Originally Posted by
handirifle
Well looking at the remington web site, at their own factory loads, when both the 308 and 300 wm are loaded with the 180gr Core lokt Ultra bullet, there is a much larger difference than you show. Except that, as mentioned, I was using the Barnes bullet, not a semi-blunt Remington Core-Lokt They show remaining velocities for the 308 is 1818 and for the 300 is 2093. That is 275fps difference, quite a bit, to me, whereas the '06 only has 1880. These are all three using the same bullet, loaded by the same company.
How an identical bullet fired at over 300fps difference from the muzzle, can reduce that to 109fps in 400 yds is not practical. It sounds impractical, but trust me, it is. The faster round has more drag than the slower one. A projectiles drag increase is equal to the square of the increase of the round. Example: if you increase the speed by double, there is four times more drag. I learned this in my physics class when I went to my aircraft mechanic school. Another example of a slower round holding onto its velocity better than a faster round is my 300 AAC Blackout: it launches the 208 AMAX at 1050 FPS. It loses less than 100 FPS by the time it has reached 300 yards.Given all circumstance being equal, the bullets will slow at a nearly identical rate. I do understand a higher MV also has higher resistance but that still takes some time to bleed off. Remington shows their MV of the 180gr 308 load at 2620, and the 30-06 at 2700, and the 300Wm at 2960. Now if you were comparing the '06 to the '08 I could understand. Those two are close, but the 300 has always had a large jump over both. This is comparing factory loads from same length barrels and similar conditions.
Now if you are listing higher 308 velocities, you might be referring to a longer barrel than they used.
And the 6.5 is not a consideration. I want to REDUCE the number of bullet calibers I have to stock. That's why this whole thing came about. I'll use the 308 for hunting when I am reasonably certain the ranges will be close, or if it is for deer or smaller. I KNOW the 308 can and has taken a lot of elk, but I will either step up to the 30-06 or 300Wm if I am after elk.
If I wanted to keep a lot of calibers, I'd keep the 338Wm barrels it has on it. That may end up being what i do, if everyone is saying there's not enough difference between the 300 and '06. Aww so darn confusing! Those darn ammo companies' marketing departments are good at their jobs :D
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