I’ve been running a 30 degree feed cone going about .030” deep on ar10 chamber ends with JP extensions. If you go much deeper you’ll be loosing case support. The problem I’m having is getting 6 creedmoors to feed with berger hybrid bullets. The elds feed just fine but that long skinny nose of the hybrid slips through the feed ramp and slams into the back of the barrel below the cone. Does anyone have a feed cone dimension that has proven to work with 6 mm hybrids and they are willing to share? I would imagine .22 creed would be even worse and want to play around with some of those in the future as well. Thanks