Bore erosion, pitting and tool marks

Today went to the range with the no4 mk2, unexpectedly no fouling shots needed.
300mt sitting at the bench, light was constantly changing as you can see in the target the group was moving 1/2 moa when sun light started hitting the target, today sky is full of clouds with pretty heavy wind.
I think tz4/47 is far superior to the ph5c.
After 20 shots:

Thank you!
I believe it’s superior because of adjustments, in the tz4/47 i found a true 1/2 moa or probably a little less instead of the 0.65 i found with the ph5c, then it’s in the manufacture, better quality in my opinion, design apart, the tz suffer from iris holder canting on the windage arm because of high tolerances, an easy fix by putting a 0.1mm sheet under the windage arm tracks to tight the gap.
No they are just 9, usually I charge the magazine with 5 rds per time to count,my was friend taking to me while shooting, I put one more in the previous target

Correct, the PH 5C sight is 0.010 inches per four clicks, this works out to about 1.25 MOA. 

I’ve shot my No.4 7.62 (1:12 right hand twist barrel) out to 1000 yds with the PH5C and the lateral POI tracks very nicely with increasing range (lateral POI does not change with range in calm conditions).   If the sight was canted, you would see the groups moving to the left or right as the range increases. You would also see elevation POI changes as you adjust the rear sight left or right. I’ve never seen this with a PH 5C.