I better pay attention then
Full chisel saw chains
The full chisel chain has square-cornered teeth, splitting wood fibers easily in the cut for fast, efficient cutting in clean softwood. Chisel chains have a high kick-back risk due to missing safety chain elements and are more sensitive against dirt. These chains are available for semi-pro (also called pro-sumer) and professional saws.
Semi-chisel saw chains
The semi-chisel chain has teeth with rounded corners formed by a radius between the top and side plates. While slower than full chisel in softwood, it retains an acceptable cutting sharpness longer, making it the preferred choice for dirtier wood, hard or dry wood, frozen wood or stump work, all of which would rapidly degrade full chisel chain. Variation of the semi-chain is "Chamfer chisel" chains by made by Oregon. They are similar to semi-chisel design but have a small 45 degree chamfer between the plates rather than a radius. Performance is similar to good semi-chisel. Semi chisel chains have a lower kick-back risk. These chains are available for consumer, semi-pro and professional saws.
Low-profile chains
Low-profile chains are chains with low teeth and safety elements between teeth. These chains are used on consumer saws for non-experienced operators. These chains are more insensitive against dirt, but require more frequent sharpening.
Chipper chains
The chipper chain is similar to the semi-chisel chain. The key differences between are the size of the radius at the working corner. In cross-section a chipper tooth looks like a question mark, having a full radius over the whole cutting portion of the tooth, whereas a semi chisel design is more like a number "7" with the top-right corner slightly rounded.
Chisel can be square ground or round ground ,
This info came from one of the leading saw chain makers.
Give the semi chisel a run you may really like the results.
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