I would go with the pact, good warrenty usually no charge.
I have a chrony beta and it has some draw backs?
It is usually fairly consistent but will give a strange velocity during a string that will be almost 150 feet a second slower than the norm.
also need a simpler way to clear the memory. it takes about 10 key strokes and in the correct sequence.
Dave
I met a guy at the range the other day he has the same chrony and it does the same thing.
