Re: new idea is it crazy?
air density will still be different even if you ice down the rounds and the rifle. so if your planning to try to sim longer ranges then your results will not match.
Weatherby Vanguard 7mmx300win
Weatherby Vanguard 277 Magnum (awaiting assembly)
Weatherby Vanguard 257wby
Savage LRH 6.5x284