Look for any target ammo, eley, lapua, sk,
Hirsch precision, site sponsor carries lots, and if you local dealer doesn't have any they can always source some for you from their supplier North Sylva. Many dealers don't carry it, as its typically more money, as its target ammo, not hunting ammo.
that 'greasy' stuff is lube that improves accuracy by reducing friction in the barrel, for those that don't know. Many higher end target rounds have tiny divets or grooves around the circumference of the projectile for the purpose of transferring lube along the bore as the bullet slides by.