All these points have killed and recovered Deer or hogs. Despite the number that I have killed, the ones that I have lost are the ones that taught me the most. My bows are all mid 50's - 60# bows, 500-600 grain cane arrows and each point is no more than 100 grains and most of them are in the 80 range. They all have (or had) serrations that were scary sharp. The things that have hurt me the most on penetration are too big of points, too blunt of points, too light of arrow, too dull or smooth edged points. I have found that serrations have helped more than hurt. If the serrations are really sharp, they wont hurt penetration. The serrations really help when it comes to snagging and ripping lung tissue to ribbons. When it comes to a big elk, I'd choose the same size points as for whitetails, maybe even a touch smaller. I typically get out both sides of deer and often times get total pass throughs, so I'd really be trying to get as much penetration as possible on an elk. You might be able to get out both sides of an elk if you miss a rib, but even deer ribs can slow and deflect an arrow enough to hurt penetration, so I'd imagine that problem would be compounded on a big elk rib. the points sound light, but stone is not nearly as dense as steel. Choose measured dimensions over weight. Make up the weight in your arrow and leave you points small 7/8 -1 " wide and 2- 2.5" long and as sharp as a brand new, carpenters saw blade. also make sure the transition is tapered and smoothed to perfection, no hang ups on the transition. Nothing is worse than watching an animal run off with your arrow with about 2 inches of penetration. If I personally was going after elk, I'd be shooting a 60# bow 600gr arrows +/- and 80-90 grain points that are ridiculously sharp and I'd make sure my arrows fly without a single wobble.