Here's how to compare the trajectories of .177 and .22 pellets. Airgun World and Airgunner magazines technical editor Phill Price sets up the 'chalk' test.<br /><br />This item appears in AirHeads, episode 21. Watch it on YouTube http://bit.ly/airheads21<br /><br />Sign up for our weekly email newsletter http://bit.ly/weeklyemail
