About to TRY to make my first knife

This may or may not apply.
One reason some people have a problem cutting with a sawzall is the work is not properly braced or clamped. Putting your foot on a piece of 1/4" steel while trying to saw it will be slow. Clamp it down or lock it in a vise.
 
I may be talking rubbish because I am not sure what a sawsall works like, but
with hardenable steel I have had problems in the past with drilling and cutting if the metal gets hot. I was told it forms a hard skin at the contact point when the drill or saw gets to hot.

I think a lot of angle iron is basically mild steel that does not harden with heat. It is just an Idea may be rubbish. I have chaindrilled and ground blades to shape in the good old days. hard work but satisfying when I finished. Now I have a band saw it is just hard work doing it other ways.

Don't give up you will get there and it will be worth it.
 
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