RE: 243 100 grain Nos partition
NO - they are just a "regular" bullet. Sierra Gamekings are a little softer than the Pro Hunters. The Pro Hunter is one of those solid dependable bullets that expand reliably and hold together well over a wide range of impact velocities. Sometimes the core comes loose from the jacket at the very end of the bullet's terminal path, but this doesn't really affect the wound channel. They are particularly good in the 100 gr. 6MM. With good shot placement, everything from coyotes to elk can be taken with this bullet.