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Old 01-30-2004 | 09:08 AM
  #3  
noway
 
Joined: Feb 2003
Posts: 429
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From: meridian idaho USA
Default RE: Powder and temp changes?

If you work up max loads when it is cold you will need to tweak them when it gets hot. Appx 100fps to 200fps will be the appx. difference for the powders you listed.

If you work up max loads when it is hot they will be somewhat less potent when it gets cold, to the same extent inversely.

I have seen charts on the difference on the net somewhere but cannot recall the site. I think it was on a sniper site I found by doing a search on long range shooting.

The Hodgden Extreme powders are not supposed to have quite as large a pressure variation due to temperature as some other powders.
I normally reduce my loads by 1 grain from cold to hot temps using Hodgden H4831.
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