I shoot the 100 grain two blade Magnus screw-ins. They shoot as good as my field points and do not whistle. 5 Shot did a test on these and found them to be pretty durable and published the results in the Bowhunting Equipment forum. I changed from Zwickeys to these lighter blades because I wanted to lighten my arrows for flatter trajectory. Time will tell how they work on deer.

Gar

Just Say No to Crossbows!