Just drill a hole in it using a collet in your lathe, and press the tungsten in. Also works with jacketed bullets.
Ive spent a fair bit of time making hollow points out of cast semi wadcutters using a second ops lathe. Works well on coyotes and bunnies.
If the bullet is of sufficient diameter..drilling and inserting a starting pistol .22 blank can make an interesting projectile as well. Or so its been said. I think I read it somewhere....thats it..read it.
Gunner
"Pax Americana is a philosophy. Hardly an empire. Making sure other people play nice and dont kill each other (and us) off in job lots is hardly empire building, particularly when you give them self determination under "play nice" rules.
Think of it as having your older brother knock the shit out of you for torturing the cat." Gunner