62-70 grain Big Varmint bullets - 85 to 90 grain Medium Game bullets - 100 to 105 grain fat pig loads. .243 Winchester is not a practical Prairie Dog caliber. Splattering a Coyote or Bringing Down a Whitetail, Muley, or Feral Hog is what a .243 Winchester excels at doing well. 6mm bullets come in many forms because all game is not equal. The big boy bullets include: Nosler Partitions, Speer Hot Core 105s, Speer Grand Slams, Swift Scirocco IIs, and a few others I've never used yet. Hopefully, new cruise missile 6mm fare will become available as manufacturers realize how many millions of us use these great .243 caliber bullets. Nosler E-TIP lead-free bullets open a new field of experimentation for me. Cliffy