Should I try and resharpen my magnus buzzcuts of just buy replacement blades?
Here's a "how to". Not too hard. I would re-sharpen if you have the means.
https://www.youtube.com/watch?v=lz7KFDV8TS8
KME broadhead sharpener.
They give a good description on their website of how to do it.
I took my first deer with a buzzcut,very nice BH for small size. You can easily take the bleeder out to sharpen it. The main blade you can sharpen as you would any double bevel two blade. As for the bleeder, I would try to use a jig like a KME or Lansky. Replacement blades are for wheelie guys that live a disposable lifestyle. Learn to sharpen your own stuff and you will be rewarded.
Your Uncle Ted Nugent endorses the buzzcut. So for best results, have "Wango Tango" playing on a loop during the sharpening process.
Forgot to mention, I also use the round side of a small hook sharpener for the serrations on the main blade.
You should be able to sharpen it like a smooth blade because the the serrations work like a chisel.