[buckmark23]

I was shooting some new Magnus II 4 blades today and everyone made a whistle when shot. They are the vented ones so I would think that is where the whistle is coming from. I wanted to shoot these for the season and now I an starting to second guess them only because of the noise. Should I be worried?

 

[Jack NZ]

I shoot them and havn't noticed any noise at all.
But if your having a problem with them and wish to continue using them,take a strip of emery paper and smooth off the trailing edges of the cut outs,that will smooth the flow of air over them an stop the noise.
Best of luck.