Folks, I'm new to LRH and need to ask a question about reloading for cold weather. I know that barrels and the like shrink somewhat in cold weather and as such, am seeing signs of pressure in loads that were fine in warm weather. I'm shooting a 204 Ruger for varmints in Colorado and Wyoming and noticed these signs in primer flow, even in factory loads from shots taken on cold mornings. Extraction is ok and the brass is new. Does anyone out there have an idea as to just how much a load should be backed down for, say a 70 degree drop in temperature, percentage wise or whatever?