How hot to shoot?

[M99]

Doing some HVAC work, I picked up both an Infrared thermometer and a Multi-Meter thermocouple. I can use either to get an exact temperature reading on my barrel instantly. So, here's the question- How hot should I shoot my barrels? I would take readings at the throat area, where Temp should be highest. I am thinking 416

The question comes up in multiple facets.

1. During load development, what Temperature will affect accuracy? As in, can I shoot 1 group before cooling, 2 groups, etc?
2. What does the Temperature versus barrel wear relationship look like?

I have the same measuring equipment as you do, but have never bothering doing those tests, because I shoot F-Class, and the bottom line is, that it doesn't matter. We must shoot 20+ shoots fairly quickly regardless of barrel temps, and in fact, we intentionally try to shoot quickly to be able to get several shots off within a wind condition. On my 7 RSaum, with a 1.25" straight taper barrel, I can not touch the barrel after I finish a string. Maybe in Bench Rest you have more time to allow for some cooling. But aside from that, we must shoot within the confines of the rules. Active Duty snipers on the other hand, only care about their cold shoots, since they have to stick and move quickly. Either way, barrel temp really doesn't matter since there is nothing we can do about it unless we want to create water cooled barrels.