HeavyDutyWonk
No - Noslers are not bonded - they do not need to be. If you look at the top picture you will see the copper partion that separates the lead in the rear portion of the bullet from the lead in the front... The lead in the front is a very smal piece of lead and it aids the opening of the petals. That is one of the reason the Nosler will open over a greater range of velocities than any other bullet...
The lead in the rear compartment is encased in the copper jacket and can not be displaced - it sorta like a "timex" watch - it just keeps on driving the bullet deeper and deeper bone is a minor obstacle.
Severalbenefits of the flowering upper portion of the bullet, the flower is sharper than heck and just cuts it way through tissue+it creates"hydrostatic pressure" that bursts organs with liquid in them.
Been using them for over 20 years - they are great...