[8X56MS]

.....is the Speer 270 Gold Dot SP. While I have not killed a bear with this load, I have taken a number of large hogs, and 7 whitetail bucks. Pretty much instant death. I handload these in new Starline brass, over 21 grains of H110. My Marlin 1894S gives me right at 1550 Fps with this load. The 270 stabilizes just fine, and from the bench, I get groups hovering around 3/4 inch at 50 yards, and less than 1 1/2 inches at 100.
You can buy these as factory loads also. I believe the Speer number for them is "23968"