Kills me that the Powermax, Charger, etc. is referred to as a "budget bow" "beginner bow" etc. What it really is - is tested, tried and proven. They are a combination of has worked for the manufacturer in recent years. The Charger was basically an Alphamax 32, the Powermax is a Nitrum clone.
Building dies and getting set up to cast risers is a big investment and is much more difficult than reprogramming a CNC machine. Therefore when you buy a cast riser, they are not taking any chances on geometry. Once set up they make a pile of them. The mass production brings the price back down and it is also the reason you see the same riser used for several years. I have owned and shot cast risers since the only other option was wood and have never had an issue. It may not be quite as sexy to say you have a cast riser as a carbon fiber riser but a cast riser is absolutely up to the task..........and it's really fun to whip up on your buddies with a "budget" bow.