Playing with chain

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The Madsens website states that full chisel is generally 10-15% faster than semi, and square is generally 10-15% faster than round. My results have been in line with that. That said, I realize different filing methods can change things, both ways!
 
I cut through a nail with one 24" full comp square, and touched a rock with another. The rocked one was much harder to bring back to life, but I brought them both back and they are both still in use. However, square files do cost a lot more. I'm using the PFERD triangular (3 square). I like em, but it is the only square I have used, so don't go by me.
 

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