Hello all. New here. I recently got a pulsar challenger with dsa to go on a mamba lite 4×16 44. After testing it out and reading on the Internet. Many people recommend getting an additional ir iluminator. So I went out and got a tracer ledray ir. These are apparently good for 400 meters. Mine seems to be good for about 20 meters. So very disappointed with this. Has any one else used one of these. Have I got a dodgy one. I'm going to be shooting rats and rabbits up to 40 yds. Can anyone recommend an ir iluminator for this. The built in ir on the pulsar seems to be a lot better than the tracer b