At the velocity you have with the '06 the 180 gr Ballistic Tip would work fine on elk but I would have to agree with Joel and say that since its there, there is no reason not to step up to the 180 gr Accubond as it offers all the good things that the BT offers but also in a much better bullet for penetrating and bullet weight retention.
I would pic the 180 gr Accubond even over the 180 gr Partition. In my testing the Accubond will retain at least as much bullet weight and generally put penetrate the partition. Plus it shoots flatter and bucks the wind better!!
For a commercial big game bullet, the Accubonds are about as good as things get, if your rifle shoots them well and most do.
Allen Precision Shooting
Home of the Allen Magnum, Allen Xpress and Allen Tactical Wildcats and the Painkiller Muzzle brakes.
I forget the exact b.c. but it is almost the same as the 200gn accubond. In the '06 the added muzzel vel. would be great over the 200grn accubond. I just ordered some to try. Looking forward to using them. Going to try them in a 30-06 and 30-338 lapua imp. I know, not very heavy for cal, but I'm not ready for the loooong ranges yet.