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Cold bore testing
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<blockquote data-quote="Threejs" data-source="post: 1274353" data-attributes="member: 90753"><p>After reading about cold bore shooting and experiencing some strange groups from my rifle I decided to put a theory to the test. I set up a target at 100 yds. The target was a typical 5 bull target. I did not use the center in my test. I set my rifle in my house (75ish degrees) so it would always start cold bore at about 75. I was going to shoot my first round cold bore at the bottom left then immediately rack my rifle and shoot the second shot at the bottom right. Then take my rifle back inside and wait 45 minutes to allow it to cool to 75. I repeated this 3 times so I had a 3 shot cold bore group and a 3 shot warm bore (?) group. Then I changed ammo and repeated the process. </p><p></p><p>Ammo 1: 300 win mag. Winchester 180 ballistic silver tip</p><p></p><p>Group 1: cold bore approx 1.25"</p><p>Group 2: warm bore approx .450"</p><p></p><p>Ammo 2: 300 Win hornady precision hunter 200 ELD-X</p><p></p><p>Group 1: cold bore approx 1.25"</p><p>Group 2: warm bore less than .450"</p><p></p><p>I will admit that I made a couple rough shots with the cold bore shooting. But not 1.25" rough. My gun straight pounds. Sub .5" is common. Especially the hornady ammo. </p><p></p><p>This process took me literally 8 hours. But was interesting. And enjoyable. </p><p></p><p>I don't know if anyone else has played around with this but if you haven't you should. It was fun</p></blockquote><p></p>
[QUOTE="Threejs, post: 1274353, member: 90753"] After reading about cold bore shooting and experiencing some strange groups from my rifle I decided to put a theory to the test. I set up a target at 100 yds. The target was a typical 5 bull target. I did not use the center in my test. I set my rifle in my house (75ish degrees) so it would always start cold bore at about 75. I was going to shoot my first round cold bore at the bottom left then immediately rack my rifle and shoot the second shot at the bottom right. Then take my rifle back inside and wait 45 minutes to allow it to cool to 75. I repeated this 3 times so I had a 3 shot cold bore group and a 3 shot warm bore (?) group. Then I changed ammo and repeated the process. Ammo 1: 300 win mag. Winchester 180 ballistic silver tip Group 1: cold bore approx 1.25" Group 2: warm bore approx .450" Ammo 2: 300 Win hornady precision hunter 200 ELD-X Group 1: cold bore approx 1.25" Group 2: warm bore less than .450" I will admit that I made a couple rough shots with the cold bore shooting. But not 1.25" rough. My gun straight pounds. Sub .5" is common. Especially the hornady ammo. This process took me literally 8 hours. But was interesting. And enjoyable. I don't know if anyone else has played around with this but if you haven't you should. It was fun [/QUOTE]
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