10-10-2011, 06:12 AM
I think there have been people mixing all different kinds of neck and leade dimensions, which would be deviations from the Grendel chamber. A .300 neck diameter will be the most reliable in an auto-loader. I've seen plenty of people on here with excellent accuracy results using Grendel chambers and both cut-rifled and button-rifled pipes. If it doesn't go bang, supposed accuracy gains from a .295" neck will be meaningless, unless malfunctions were the objective.