Cold Bore Zero or Group Zero?

[Brandon Pattison]

Cold bore shot (CBS) is also clean and dry. What's your difference in inches between your group center and your cbs and which one do you zero?

 

[Sam Millard]

I run mine dirty, but a cold, clean barrel shot has same POI. The only difference is the MV is slower for the first 3-5 shots. The ultimate zero check is to fire a group over several days (one shot a day) with a cold bore. I usually get even tighter groups this way. I look for the first shot to be splitting hairs and find it easier to get multiples that way over a few days.

 

[Brandon Pattison]

Top group Savage 220-cbs left hole
Bottom group M70 308-cbs right hole

Savage 220 with corrections (and some 22LR)

 

[pyroducksx3]

I would think you would want the zero to be the cbs on a hunting rifle as that's the shot I expect to harvest the animal with.

 

[Sam Millard]

I would think you would want the zero to be the cbs on a hunting rifle as that's the shot I expect to harvest the animal with.

Yep! Animals don't care how tight the groups are, just where the first shot hits

 

[aron]

I run my barrel dirty as well so don't see and poi shift

 

[Travis Bertrand]

Sam said it all.

 

[RosinBag]

Dirty. I even run my work rifle dirty, but do clean it more frequently then I do my hunting rifle. My work rifle gets shot a lot so as soon as I start to see groups opening up I clean it

I have been using KG cleaning products and the cold bore has been within my groups with my work rifle.