Muzzle energy isn't always as directly related to "stopping" as you think. Some loads with less energy stop better than some with more.
Do the math. Velocity squared times bullet weight (in grains divided by 100) divided by 4500 gets you ME.
Some of my favorites:
Rem 125 GS/1100 fps from my 2 inch SP101:
1100x1100=1,210,000
125/100=1.25
1,210,000x1.25=1,512,500
1,512,500/4500=336 ft lbs ME
Reminton 110 SJHP/1200 fps=352 ME
Rem 125 SJHP/1240 fps=400
Win 145 STHP/1100 fps=390
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