Grim Reapers here. Been shooting them since I started bow hunting in 2007. I used the 1 3/8" Razor Tips in 2007 and 2008. I upgraded to the 1 3/4" cut this year. I've already punched the bigger 'Reaper through three deer this year. The last one went a good 8 inches into the dirt after a pass-thru. I should add that I use the collar to up the broadhead weight to 125 grains and my arrows weigh a bit over 500 grains total.