Unless your arrows are hitting nearly sideways, you should get pass-throughs with your setup. At 72# I don' t think a 467 gr arrow is too heavy. With broadheads your FOC may be a little low. If the arrows shoot & group well, you' re OK. I don' t agree with the 11# of KE increase. The resulting loss of speed will have a large affect. Momentum will be better, possibly, which will help penetration. Your speed with the new arrow will be around 218. KE= 49. You may want to check the tune on your bow (or other possibilities). The 370 gr arrows should have worked well for you.