I have no experience with the shuttle T loc but I do with the Slick Tricks. The STs would be my choice. They have a strong steel ferrule and thick, sharp blades. And fly like a field tip. Now there are several models to choose from though. This is dependent on your bow set up. If over 60 lb DW then you can use any model with confidence. If you are shooting 60 lb or under I would go with either the Razor Trick or the newer Viper Trick. The reasoning is that these 2 will give you better penetration with a lighter DW.