I shot 22 for a while but when I would go from 70 to 20 degrees I would lose like 150fps and groups would go from .75" to 1.5" with a shifted POI.
How was the R-22 load effected by increasing or decreasing the powder charge by a grain or two?I find that loads where the groups change noticeably by changing the powder charge slightly,are also the most sensitive loads to changing atmospheric conditions.I avoid hunting with any load that is not consistent as the powder charge is varied by a grain or two.