I do use H414 and know it to be very sensitive to temperature. Not only will your POI height vary significantly with a 20�F temperature change, but accuracy will also suffer.

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I thuink you will find that to be an individual rifle result. I have dones as you suggest and found no difference velocity or accuracy and my loads wer eused in 90 degrees and 20 degrees. The cartridges I tested included 7x57, .30/06 and .460 Weatherby. All rifles showed no change but I will stress, that was from a single powder lot.

John

When truth is ignored, it does not change an untruth from remaining a lie.