1)Saw plate (base) or saw mounted guide maybe be out of alignment with the blade. Usually most circular saw don't have any real adjustment.
2). If you are cutting free hand, you could have tendency to lean on or push crooked. Remember, the handle on saw is usually offset the centerline of blade. Use guide when possible.
3) Blade has a warp or bend. Do you see pitch on certain parts of the one side of the blade?
4) Wet/green lumber. Also, there are many dried lumber that has tension which is released when cutting and it sometimes pinch or bind the blade.
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Two 125's and a 124 all with 42" decks
Plow blade
#2 Cart
QA36 snowthower
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