Ballistic Tips are made in different jacket thicknesses, depending on the intended use of that particular bullet, and some models have even changed over the years. I didn't include the example as any sort of claim that ALL Ballistic Tips will do the same thing--but the 200-grain .338 has been made the same way ever since it was introduced in the early 1990's (though now it's only available as the 200-grain Ballistic Silvertip).
The reason it acts that was is the jacket is about 2/3 of the bullet's weight. The same contruction is also used in more recent 165-180 grain .30 caliber BT's, yet people keep saying, "Oh, no, you can use those on elk, because they blow up on deer." You might ask Shrapnel about using the 180 BT on elk from his .300 Weatherby.
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