I just killed an antelope w/ 125 grn Rockey mnt snypers, and lets just say they did the trick. I hit him right in the boiler room and the arrow exited w/ a complete pass threw, threw the shoulderblade. He only ran bout 35 yrds, which is how far i shot him. I shoot a 72# hoyt vtec, so im smackin them w/ alot of KE. I however carry both mechs and fixed. I use the fixed for second shots. After seeing the results of the antelope im hooked on these snypers, Ives seen antelope run for 1/4 mile after getting smacked in the kill zone w/ a 300 winchester mag, so they be tough animals. I like the snypers because they are one of the only "rear-ward" opening exandables on the market. This makes for a nasty entrance wound as the blades "cam" out past their locking point at first. While i admit this sucks up energy, w/ my setup i have room to spare. I also like them because they dont have a super large cutting dia.a large cutting diameter sucks up to much energy in my opinon. I shoot muzzy 125 for my fixed blades. They are about 1/2 as sharp as the mechs, which i think decreases the need for enegry as a shaper blade takes less energy to cut. In my block target i get about 2 inches more penetration w/ the mechs as i do w/ muzzys.