feeding issues

[Kirk]

AR 10 in 308 having feeding issues with mag installed. Bolt slows about half speed with ammo in mag, no ammo it closes normal speed. Closes normal without mag. Cycles fine when single loading, locks bolt open like it should. This is driving me crazy trying to figure this out. I've never built an AR10 but have built 9 AR15's with no problems. Thanks in advance

[Armed Eye Doc]

Welcome to the forum.

Have you tried different mags from different manufacturers? 

[Kirk]

Thank you. Tried 4 different mags, but all same manufacturers

[jtallen83]

2 hours ago, Kirk said:

Thank you. Tried 4 different mags, but all same manufacturers

More info on the rifle, is it a true AR-10 or an 308AR? If the later who is the manufacturer/manufacturers? What brand of mags? How many rounds through the rifle?

[shepp]

5 hours ago, Kirk said:

Thank you. Tried 4 different mags, but all same manufacturers

Welcome to the forum feel free to tell us about your self in the intro section

[survivalshop]

3 hours ago, jtallen83 said:

More info on the rifle, is it a true AR-10 or an 308AR? If the later who is the manufacturer/manufacturers? What brand of mags? How many rounds through the rifle?

 This ^  Tell us about the Rifle , 

[bfoosh006]

More info as well , please.

My PSA PA10 GenII does this with Lancer Mags ( ever so slightly ) But functions perfect with Magpuls and D&H mags.