The point is that with a longer case and 19% more powder space, an extra .1" in bullet length isn't going to handicap a .30-06 the way you think it does a .308 Win.
* * * * The "handicap" from a longer bullet is about the same in either case since the bullets are the same diameter, and thus the loss of powder space is exactly the same. * * * *
Mr. L Bob - I can't find the thread or I'd quote our own Mule Deer (J B). He has said more than once that "seating bullets deeper does NOT take up powder space".
There is such a thing as 'compressed' charges.
Good Lord, this thread is full of interior ballistics absurdity from you and coyote. Certainly you can compress powder. But that doesn't mean that losing powder space (or usable case capacity or whatever you want to call the space inside the case (really, fire-formed case) not taken up by the bullet) has no effect. Spend a little time with any interior ballistic simulator, and you'll find that when you lose space but keep the powder charge the same two things happen:
1) pressures go up and 2) velocities go up, but not as much as they would have gone up if you loaded to the new higher pressure with the bullet farther out
So any time you occupy case capacity with the bullet, the overall performance of your cartridge in terms of what velocity/pressure combinations it can achieve gets worse. Now in this case, since the amount of space lost to the longer Speer boat tail bullet vs. the shorter Nosler is exactly the same, the effect on the two cartridges is exceptionally close to the same. But there is an effect.
