Canazes9,
They will open down to 2500fps? or 1500?
He said 2,500 because that is the number I asked about. With a starting velocity of 3,250 feet per second it arrives at 700 yards with slightly more than that. Right now 700 yards is a very long range to me. He didn't volunteer much. I had to ask about anything I wanted to know.
Except he did start talking about drag racing in the old days. Something I did about fifty years ago.
I went to rifle barrel twist site and discovered it theoretically will stabilize in an 8" twist.