barry77 Posted March 4, 2010 Report Share Posted March 4, 2010 Ihave a mathews z7 set at 70lbs. 28 1/2 inch draw,cx 250 arrows. The bow groups badly and at 40-60 yards the arrows drift right,are my arrows under spined or is it a rest issue.have not had this problem in the past with my mathews Lx but was shooting cx 300 arrows,the pro shop says the 250 arrows should be fine.Any help on the topic would be greatly helpful, thanks Quote Link to comment Share on other sites More sharing options...
dbHunterNY Posted March 4, 2010 Report Share Posted March 4, 2010 I'm not really a bow tech, but looking at the carbon express chart I'd think you were under spined. It is the adjusted weight, but still. There is a number to call if you're ambitious. lol Maybe someone else will agree with me? http://www.carbonexpressarrows.com/cms/sites/all/themes/gorillastandstheme/catalogFiles/2010CXCATCHARTS_final.pdf Hope this helps you. Quote Link to comment Share on other sites More sharing options...
Larry Posted March 4, 2010 Report Share Posted March 4, 2010 If you have any of the 300's left try them at different distances and see if there is a difference in their flight. Could be just a tuning problem. Quote Link to comment Share on other sites More sharing options...
Diamond Archer 01 Posted March 4, 2010 Report Share Posted March 4, 2010 Welcome to the forums!!! Quote Link to comment Share on other sites More sharing options...
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