Author Topic: Can Barrel Heating Cause POI Changes?  (Read 340 times)

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Offline Patriot_1776

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Can Barrel Heating Cause POI Changes?
« on: July 15, 2005, 08:11:27 AM »
Almost got ya for a minute there! :)

 Don't be fooled by the title.  I'm talking about solar barrel heating; not of that from friction or combustion associated mainly with centerfire and rimfire rifles.  I am curious to know whether points of impact could vary (considerably?) depending on how warm the barrel is from sitting in the sun a bit.  

Example: It is 77F degrees inside a house; so is the barrel.  Go outside, and it is 90F degrees.  The sun is also pretty strong, and the barrel absorbs heat energy (because of a dark finish); the temperature of the barrel may rise to 100F degrees or more.    


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Offline Lawdog

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Can Barrel Heating Cause POI Changes?
« Reply #1 on: July 15, 2005, 10:21:04 AM »
Good question.  Maybe "dave" or someone here can help you with it.  I have never given it a though as where I shoot around the house it's usually in the shade(porchs, barn, home shooting range).  The club shooting stations all are covered too.  Lawdog
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Gary aka Lawdog is now deceased. He passed away on Jan. 12, 2006. RIP Lawdog. We miss you.