I've owned numerous shoot-through cronys (and cursed every one of them), have used other's Magnetospeed V2's & V3's, and finally purchased a LabRadar. Magnetos are great... light years beyond optical cronys, and would absolutely recommend them. Only issue I have with them is that while attempting to develop a load for a rifle, you can change the barrel harmonics while it's on, potentially affecting group size & POI. IMO, the best procedure is to develop your load, then strap it on to see what that load is doing for your ballistic calculations. Now LabRadar is pricey, but it is to Magneto what Magneto is to opticals... another serious jump. Just set it up, aim at the target, and press GO... that's it. You're getting data during load development while knowing that nothing is affecting your shots.