That's one heck of a wallop. Groupings at 10yards; 15yards? Pics of your darts please
How long is your cone?
Im aussie, so i talk in meters, i was probs about 10 meters away...
Here is a pic of a few of my darts (Nail is held in place with super glue, they are all diffrent sized cones)

Here is just a single dart:

All made quickly without fussing much about them, they all fly well so....
Some are still drying...
Tomoz, i am doing a few accuracy and distance tests, Finding out what range i can be at to get a accurate shot, what distance can be at and have to adjust my aim to get a accurate shot ect.
This thing will easily destroy a pest bird, small and small-medium game.
Will try making it bolt action this week, and i might get a sight