KB399s with Magnum heads

Siksty7 Dart 270 said
I'm hijacking my own thread, but is calculated 9.0:1 worth $278.00 over calculated 8.5:1? I'm taking votes.

Not just no, but hell no. The general rule of thumb is, for every ONE POINT increase in compression from say 8:1 to 9:1 only gains 3%. So you're talkin about 1.5% for 278 bucks.