u/Intelligent_Pitch260

A few months ago i bought a CHEAP compound bow kit that came with 12 cheap arrows. At 10 yards i can keep my grouping under 3 inches, but at 20 and 30 yards they seem to be sparratic with up to a 12+ inch group at 30 yards. The 30 inch arrows that came with it seem to be perfect length for my bow with the way i have it set up. I just had my draw weight measured at 48lbs with the adjustment maxed out. What spine should I look for? What else should I look for when selecting arrows? Does anyone have a suggestion for brand/scource to keep cost as low as reasonably possible? I get that good equipment doesn't give better skills, but I feel like the arrows that I have are just cheap junk and would like to upgrade them.