Cold bore time?
- Thread starter Slaymoar
- Start date
Depends on the barrel weight(read thickness). Easiest way is to put your hand on the barrel before the first shot, take a mental note of just how "cold" it is then take a shot and let it sit until it returns to that temp. Most of my sporter weight barrels are cool within 20 minutes-ish. Bring along a 22lr and do some banging away with that while you wait for the barrel to cool.
Also, the barrel will cool faster if you lean it up against something so the barrel is vertical(or close to it) and the bolt open. The air will flow through the barrel cooling it quicker.
Also, the barrel will cool faster if you lean it up against something so the barrel is vertical(or close to it) and the bolt open. The air will flow through the barrel cooling it quicker.
Dogleg's right about different barrels.
When I'm range testing cold bore consistency, I bring a whole quiver of rifles to the range. I'll shoot one shot with the rifle in question, rack it, shoot a whole bunch of other stuff, then pick that one rifle up for another single shot. Then lather, rinse, repeat as necessary.
For total confidence in a hunting rifle, I want those 3 (or whatever your number is) cold bore shots to hit POA (+ or - my own margin of error), AND I want it to put 3 quick consecutive shots within my dispersion criteria after load testing (usually 1.5MOA for a scoped rifle.)
All that trigger time at the range is the fun part!
When I'm range testing cold bore consistency, I bring a whole quiver of rifles to the range. I'll shoot one shot with the rifle in question, rack it, shoot a whole bunch of other stuff, then pick that one rifle up for another single shot. Then lather, rinse, repeat as necessary.
For total confidence in a hunting rifle, I want those 3 (or whatever your number is) cold bore shots to hit POA (+ or - my own margin of error), AND I want it to put 3 quick consecutive shots within my dispersion criteria after load testing (usually 1.5MOA for a scoped rifle.)
All that trigger time at the range is the fun part!
When I used to have a 200 yard target set up 203 yards from my back door I used to wait 24 hours when testing cold bore consistency. Obviously that doesn't work if you drive to the range.
It depends on a lot of things, ambient temperature and your barrel being pretty key. I would give it a minimum of 30 minutes.
It depends on a lot of things, ambient temperature and your barrel being pretty key. I would give it a minimum of 30 minutes.
tylerjwitty
CGN frequent flyer
- Location
- Northern Ontario
IMO 
a gun that has much POI change due to barrel heat, isn't much good. If your flinging bullets on your 2nd and 3rd shot, what the point in owning a repeater??
a gun that has much POI change due to barrel heat, isn't much good. If your flinging bullets on your 2nd and 3rd shot, what the point in owning a repeater??
