Does anyone know how fast an API M8,or simular slug has to be going to flash on a hard target like steel or rock?
thanks
SS

SS,
Welcome to the forums... and it doesn't have to be going very fast, at all. Remember, a "flint and steel" fire starter just requires a scraping motion to elicit sparks, and a good, strong pressure, at ~100 to 200 fps will light most fires.

You hit a rock with a steel jacket 50?

jeffe

Thanks Jeffeosso
We have a lot of rocks and steel targets in the
backstop of our range and have hit them with the
50 M2 Browning-alot but I plan on building a
50 low velocity shoulder fired toy and was not sure how fast (or slow) the API had to be going
to WOW the crowd.
SS