Balance.
A weight rear bias is more stable.
If there is the slightest wobble, forward weight enhances it.
Rear helps to attenuate it.
a solid bullet would perform better.
Maybe not. My cousin was a bench rest shooter and HP is what they shot. I figured they knew. On a side note I mistakenly shot a big boar hog with a Hornady BTHP 178gr. in my .30-06. I had intended to load with 180 Speer Hot-Cor but had the HPBT instead. He went down like a sack of rocks. When I shoot water jugs with them there is no evidence of expansion. The same result was noted with 155 Scenar. I saw a deer that Dirt Farmer shot with a Scenar out of a .240 Weatherby and the damage was ugly to see. Guessing the bullet speed is a factor. My bullets go about 2750, his probably 3400+. But in any case the HP must be more accurate than FMJ.
