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Rifles, Reloading, Optics, Equipment
Rifles, Bullets, Barrels & Ballistics
Extreme ES caused by barrel?
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<blockquote data-quote="StumpGrinder" data-source="post: 2077708" data-attributes="member: 114832"><p>First shot out of a cold bore will be diffrent. Also freshly cleaned and oiled bores will increase velocity due to reduced friction. This is the reason for fouling shots, to stabilize the string. As metal heats up it expands causing reduced surface contact on the bullet. This is why heating the nut on a stuck bolt will often free it up. There are 2 schools of thought in long range shooting which is determined by how you shoot. Hunters usually only get one or two shots at game so it is better to tune for first shot/cold bore accuracy. Competition shooters start a match by shooting warm up shots and therefore tune to a warm or hot barrel. Few rifles will shot to the same point in both situations. If you are primarily a hunter don't let your barrel heat up to much. 3 to 5 shots then let it cool. If compitition then don't even look at groups untill the barrel is warm. I'm a hunter and this is just my opinion from reasearch I have done. Half inch 100 yd groups would be fine with me regardless of velocity spread. Have you tried a barrel tuner to shrink them down?</p></blockquote><p></p>
[QUOTE="StumpGrinder, post: 2077708, member: 114832"] First shot out of a cold bore will be diffrent. Also freshly cleaned and oiled bores will increase velocity due to reduced friction. This is the reason for fouling shots, to stabilize the string. As metal heats up it expands causing reduced surface contact on the bullet. This is why heating the nut on a stuck bolt will often free it up. There are 2 schools of thought in long range shooting which is determined by how you shoot. Hunters usually only get one or two shots at game so it is better to tune for first shot/cold bore accuracy. Competition shooters start a match by shooting warm up shots and therefore tune to a warm or hot barrel. Few rifles will shot to the same point in both situations. If you are primarily a hunter don't let your barrel heat up to much. 3 to 5 shots then let it cool. If compitition then don't even look at groups untill the barrel is warm. I'm a hunter and this is just my opinion from reasearch I have done. Half inch 100 yd groups would be fine with me regardless of velocity spread. Have you tried a barrel tuner to shrink them down? [/QUOTE]
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Rifles, Reloading, Optics, Equipment
Rifles, Bullets, Barrels & Ballistics
Extreme ES caused by barrel?
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