Lifters; Crower vs. Erson?

Thanks Mean416!!! Great…now I’m not putting ANY lifters in there!!!
Joke.
Informative video, thanks for that.
I often wondered about the chamfer on lifters and their purpose and effectiveness.
I’m hoping my same brand lifters are older and better metal or better QC than the ones he was working with.
But I will definitely look alot closer now cause of that vid.
Crazy to think of all the unmatched lifters and cam shafts I used on half mile round track with no problems.
Maybe because of the high RPMs, lots of oil slung around like during breakin!?
Maybe Metalurgy!?
Who knows!?
But I will be checking angles.
I marked each lifter so when I turn it over manually I hope to see the lifters spin in their bore.
Thats next after closer inspection of the Crowers.