I bought mine 2 yrs ago and it works fine.
I'm sorry you're having this problem.
Here's my questions...from duh to ??
Not trying to be a smart
here...
1. Does the blade on your new one feel as sharp as the old?
2. Is the hinge pin the right size for the holes it goes through..maybe it's sliding a bit and "shaving" thru the feather rather than chopping straight through.
3. Do the feathers you're using chop ok in your old choppers? With the declining quality of feathers these days maybe the feathers you're chopping are so weak there smushing down and getting crushed/cut rather than standing strong and getting cut straight through.
4. Is the strike plate flat?