Hey 'softers, I recently installed a Matrix 6.03mm tightbore barrel in my Echo-1 ASC-H and I was somewhat disappointed when first fielding it today. Its accuracy was moderate, if not just as good as it was with the stock 6.1mm barrel. At a range of about 20-50 feet, the grouping was fairly decent. However at about 60-100 feet, the BB's would scatter everywhere instantly. It was the equivalent of going from a dead-straight laser to a pump action shotgun within the 40-80 foot difference. I have no idea why this is, or what is causing it, but i need some advice to fix it as it is incredibly annoying. Im using .25g, 6mm pro-grade ammo and am using a stock bucking and hop-up unit. Also: I do realize that this is a tag-along question, but I am having feeding problems with my stock hi-cap Scar-H mags that came with the gun. The spring can be a full tension, but it will not push bb's up into the rifle at all. Any help on this would be appreciated as well. Thanks guys, -Jupiter