I took my saw to a local dealer and said I want to cut some big trees...he looked at the saw and said "not with that chain you won't". I knew I needed a new chain and I've read some about full chisel so I said to him (trying to sound like I sorta knew what I was talking about)...guess I need a full chisel, huh? Yep was the reply and I was then told what I had on the saw was a chipper. So I've heard about safety chains, full chisel/semi chisel and skip tooth. I now know what a chipper chain is but I really have no idea why one chain would be preferred over another or just what each type of chain is best suited for...any quick answers for me? As for the chisel chain...all I can say is WOW! Why didn't I do this sooner?