RE: 243 bullet
The 100gr Hornady BTSP is a great deer bullet, believe it or not the 100gr Winchester Super X works very well too. The 95gr Hornady SST works very well also. I have a friend that shoots a 75gr hollow point handload that is pure death on whitetail and mule deer. Put the bullet where it is supposed to go, and any of the above will do the job just fine.
Have fun!