Zwickey Eskilites = 135 grains. Been using them for two years with a deer harvested each year. Being new to archery, I was shooting a light bow (40#ish) with 100 gr brass inserts. Blood trails weren't great, but I recovered both deer within 100 yards of the initial hit. That being said, I was a greenhorn for sure... Going into my third hunting season, I now own a 55# bow, Eskimo Heads (160) and a KME sharpener. My heads now are WICKED sharp.
A bit of a cliche, but there's a reason: SHARP heads are the best heads...