Starting this year ill be using 160gr Snuffers for everything! Tough, easy to sharpen, and fly true(they also leave a nice hole too!). In the past i always used the 135gr Zwickey Delta 4 blade and never lost a bird! The trick was to get the main blades razor sharp, and only touch the bleeders a bit with a file! Still gets plenty of penetration but with the "dulled up" bleeders it seemed to help keep the arrow in 'em makin recovery easier! I discovered this by accident as i shot a gobbler that the arrow stayed in and then on the way home realized how late the night before i only sharpened the main blades and got sidetracked and forgot to do the bleeders! Ive had a few recovered just by spotting the fletching sticking up out of the underbrush!!!