Small Chamfer with +/- .5 deg tolreance

Hello guys I have parts that have 4 small chamfers.Chamfers are 100 degrees +/- .5 deg.They are only .050 deep I'm using .5 mm probe auto cone with sample hits(tried it without sample hits as well ), running it very slow but I don't get good results.They are good and bad sometimes off by seconds.When checked with mold on a comparator it's good




is .050 enough of an area to verify tight tolerance angle on a cmm?Any advice would be appreciated area to verify tight tolerance angle on a cmm?Any advice would be appreciated