6 Dasher barrel, about 8-900 rounds shoot in slow pace, using varget and Sellier & Bellot primer.
Chamber around the neck area


Aound the throat area just before reaching the rifling


Roughly 5-7inches towards muzzle

About half way towards muzzle

I clean the barrel every time after went to the range, most of time in the same day, only a few times I cleaned 2 days after.
I noticed some grouping issue this year, 5 shot group size increased from average 0.5 MOA to 1-1.5MOA without making any change to the load. Shot 700 rounds last year, then left the barrel after clean it before winter). And I used a bore scope taking some photos before I cleaned the barrel. Not sure if the grouping issue is related to how dirty the barrel is? (Checked action screws, barrel torque and scope mount)
Chamber around the neck area


Aound the throat area just before reaching the rifling


Roughly 5-7inches towards muzzle

About half way towards muzzle

I clean the barrel every time after went to the range, most of time in the same day, only a few times I cleaned 2 days after.
I noticed some grouping issue this year, 5 shot group size increased from average 0.5 MOA to 1-1.5MOA without making any change to the load. Shot 700 rounds last year, then left the barrel after clean it before winter). And I used a bore scope taking some photos before I cleaned the barrel. Not sure if the grouping issue is related to how dirty the barrel is? (Checked action screws, barrel torque and scope mount)