I am leaning towards trying these out. I just bought a new Hoyt Katera XL and now feel I have the energy to push bigger cutting heads through deer. I seen the write up about mechanical b/h in Bowhunting World magazine and the two heads I was thinking about (Grim Reapers Razortip and Wasp Jackhammers) fared well. I like the tips on these two. Here are my few questions.....
1) which one have you tried?
2) why did you like/dislike them?
3) If you have used the GR, did you shoot the 1 1/4" or 1 3/4"? Which do you prefer?

Just looking for opinions on these two only!

All I can tell you is that my brother in law uses the Jak hammers exclusively to take many deer and has been completely satisfied...

This will be my first year with the Grim Reapers, the bigger ones. I've been shooting them quite a bit into various mediums, and am happy with them so far, very happy. They have opened every time, leave a great hole, and fly awesome. sorry I don't have experience with the Jakhammers. I shot my reapers into a ham (pork), just for research's sake, and they broke the bone with the head undamaged, so they are certainly tough too.

When I used mechanicals, I used the WASP Jackhammer and was very happy with the penetration. The blades were softer than other mechanicals I used and tended to bend some, so I would have to put new blades on them after practicing before the season started.

I took my first deer with a grim reaper razor tip,very good blood trail and a whole big enough to drive a mack truck through.......

I killed 4 book bucks with the Jackhammers awesome head and it flys great, I am going to shoot the grimrippers this year 1 3/4 razor tips because I reaslly like the no rubber bands. I don't think you would be disapointed with either head.. Walt

I've had good luck with both the 1.75" and 1.25" Jak-Hammers. I've had good easy to follow blood trails, and dead deer at the end of EVERY one. That being said, I've heard good things about the reapers also, so either way, as long as you put the arrow where it's supposed to be and have plenty of energy (55ft/#'s for a WT Deer), you should do well!!!

Seriously........flip a coin.

Same design principle,same cutting diameter, both quality construction and will be fine out a Katera.