Author: Muddly
Subject: What is normal case growth in a new No4MK2
Posted: June 25 2016 at 9:50am
I degrease the rounds with a rough towel wet with rubbing alcohol. The chamber gets a tight dry patch x2. I also dry off the bolt face. The last time I shot, I just cleaned the bore, but forgot to dry patch the chamber. Must've got a bit of Hopes in there as my first group was 4 1/2 inches high, the 2nd group 2 inches high and it must've cooked out because the 3rd group was where it should be. Group size was excellent, but showed the wet chamber elevation jump. These were Mk7 equivalent and cases only grew .001. Not a science...
Subject: What is normal case growth in a new No4MK2
Posted: June 25 2016 at 9:50am
I degrease the rounds with a rough towel wet with rubbing alcohol. The chamber gets a tight dry patch x2. I also dry off the bolt face. The last time I shot, I just cleaned the bore, but forgot to dry patch the chamber. Must've got a bit of Hopes in there as my first group was 4 1/2 inches high, the 2nd group 2 inches high and it must've cooked out because the 3rd group was where it should be. Group size was excellent, but showed the wet chamber elevation jump. These were Mk7 equivalent and cases only grew .001. Not a science...