shoot what you can accurctly no speed or flat flying arrow will do you any good if you kit the broad side of the barn when shooting.
But it will help. When i bought mine we worked up from 60 in 2 days i could tell the differnt. Now i am at 68 pounds. Seems to work for my setup.I shot one pin out to 20 or 25 yards. It will be about 2 inchs low at 35.