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Rifles, Reloading, Optics, Equipment
Rifles, Bullets, Barrels & Ballistics
Barrel Contour vs Accuracy Potential
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<blockquote data-quote="Pdvdh" data-source="post: 1180908" data-attributes="member: 4191"><p>Many like to run with minimum of #5 contours, is what I've gathered. </p><p></p><p>I have a lot of sporter weight barrels. These would be like #2, #3, & #4 contours. </p><p></p><p>Something that's not been mentioned in this Thread is my experience that load development takes more time and effort with the lighter contour barrels, compared to heavier contour barrels. They're less rigid and more finicky. </p><p></p><p>Lighter contour barrels also heat up more quickly than heavier, thicker barrels, and I've had groups open up on the third and fourth shots with some of my rifles. If you're committed to firing 5-shot groups, then I advise you go with a #5 or heavier barrel contour. My own opinion is that 3-shot groups are more than sufficient to determine group size. I don't like to use up barrel life with heavy powder charges by trying to print 5-shot groups. </p><p></p><p>It's true that groups ONLY get larger, the more shots fired. It's impossible for them to shrink. But how many shots are you planning on firing at an animal? I have a couple lightweight Tikka T3s that will start to open up by the third shot. It's a complete waste of time, ammo, and barrel life shooting 5-shot groups with my two Tikka T3s in 7mm Rem Mag.</p></blockquote><p></p>
[QUOTE="Pdvdh, post: 1180908, member: 4191"] Many like to run with minimum of #5 contours, is what I've gathered. I have a lot of sporter weight barrels. These would be like #2, #3, & #4 contours. Something that's not been mentioned in this Thread is my experience that load development takes more time and effort with the lighter contour barrels, compared to heavier contour barrels. They're less rigid and more finicky. Lighter contour barrels also heat up more quickly than heavier, thicker barrels, and I've had groups open up on the third and fourth shots with some of my rifles. If you're committed to firing 5-shot groups, then I advise you go with a #5 or heavier barrel contour. My own opinion is that 3-shot groups are more than sufficient to determine group size. I don't like to use up barrel life with heavy powder charges by trying to print 5-shot groups. It's true that groups ONLY get larger, the more shots fired. It's impossible for them to shrink. But how many shots are you planning on firing at an animal? I have a couple lightweight Tikka T3s that will start to open up by the third shot. It's a complete waste of time, ammo, and barrel life shooting 5-shot groups with my two Tikka T3s in 7mm Rem Mag. [/QUOTE]
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Rifles, Reloading, Optics, Equipment
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Barrel Contour vs Accuracy Potential
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