I've shot pig doubles with a 270 and Nosler Ballistic Tips. If, however, I was planning on shooting a double, I'd go with a Nosler Partition or something from Barnes. I've shot a deer double with Remington CoreLokts in a 30-06 (but the double was not intended).

Cast, you are thinking about some other bullet. The back half of that Partition will go through even the second pig. Penetration is what makes that bullet popular.

Well, you might be about 60% correct...

Copied from somewhere on the Internet, so you KNOW it is right -

Partition bullets are really two bullets in one. There are two lead alloy cores separated by a solid partition of gilding metal jacket material. The front core is encased in a relatively thin tapered jacket to insure that adequate expansion is initiated when the bullet strikes even the smaller species of CXP2 game. The internal partition positively prevents the bullet from opening beyond that point, retaining the rear core for deep penetration, even in heavy CXP3 game. Recovered Partition bullets retain about 60% of their initial weight regardless of how violently the front part of the bullet expands. The minimum impact velocity needed to initiate expansion is 1800 fps. The Partition bullet has earned an outstanding reputation in the field as a killing bullet.

One shot, one kill...

Hornady Interlock (NOT SST's!) bullets will do exactly what you want. I have never recovered one of these bullets as they always pass through completely.

I have several doubles to my credit, and the Interlock was the bullet used for each event. Normally a 150 grain Interlock out of my 30-06 is the weapon & bullet/bullet weight of choice.

yup, dawn har we put that old otra-mag ta yous lyke tat! dem bullits are eeekspensave!!!!

50 cal.