Author: Muddly
Subject: What is normal case growth in a new No4MK2
Posted: June 17 2016 at 5:42am
Am using Remington brass with loads of various intensity. With lighter loads, I'm getting growth from firing of .002 to .004 and .005 in my Lee full length die set to neck size only. Mk7 equivalent loads grow .005 to.007 in firing. Same in die. Annealed cases are ridiculous in their growth and inconsistent too. Actual headspace in this rifle is .066 so that isn't it and she has a tight chamber. I had been trimming to 2.20, but found accuracy to be substantially better trimming to 2.215. I decrease the rounds after reloading and thoroughly clean the chamber .. Got some brass loaded x8, but am getting a tad nervous. Is this normal? My first Mk2 didn't do this badly.
Subject: What is normal case growth in a new No4MK2
Posted: June 17 2016 at 5:42am
Am using Remington brass with loads of various intensity. With lighter loads, I'm getting growth from firing of .002 to .004 and .005 in my Lee full length die set to neck size only. Mk7 equivalent loads grow .005 to.007 in firing. Same in die. Annealed cases are ridiculous in their growth and inconsistent too. Actual headspace in this rifle is .066 so that isn't it and she has a tight chamber. I had been trimming to 2.20, but found accuracy to be substantially better trimming to 2.215. I decrease the rounds after reloading and thoroughly clean the chamber .. Got some brass loaded x8, but am getting a tad nervous. Is this normal? My first Mk2 didn't do this badly.