ORIGINAL: Swamp Dawg
Arrow with 85 grain tip = 383 grains.....................275 fps= 64 ft lbs KE
Arrow with 100 grain tip=398 grains.....................271 fps= 65.4 ft lbs KE
Arrow with 125 grain tip =423 grains.....................257 fps = 62 ft lbs KE
This makes sense that the 100 grain arrow penetrated the deepest with the most KE.
Looking only at KE, what doesn't make sense now is that the 85gr produced more KE than the 125gr but penetrated less than it. Just an observation, I can't offer any explanation.