I've killed 3 bulls (one had a live weight of over 900 lbs)with Muzzy 90 & 100 grain 4-blades and 2 mule deer, all in the last 3 years. To say the least, they are sufficient. I've had pass throughs on all 5 animals and the longest blood trail was about 60 yards, shortest was about 10 yards. I was using arrow weights ranging from 450 grains to 380 grains out of 70-74 lb. bows. These heads are VERY effective on elk. Excellent blood trails! FWIW the weight of the head has VERY little to do with the efeectiveness or durability of the head, IMHO. It's all about design. These heads would be perfect for your set-up.

"What we do in this life echos an eternity"