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Rifles, Reloading, Optics, Equipment
Rifles, Bullets, Barrels & Ballistics
seat vld's to the lands or off a bit?
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<blockquote data-quote="Guest" data-source="post: 27190"><p><strong>Re: seat vld\'s to the lands or off a bit?</strong></p><p></p><p>Rufous.... I like a 30 degree angle from a parallel neck to a parallel free bore area leading to a 1 degree throat. The amount that you place a bullet into the lands is affected by several things, whether you have a 3 groove, 4 groove, or six groove barrel. The angle of your throat, and how tight your free bore area is, will all affect how far into the lands your rifle will prefer the bullet to be.</p><p></p><p>I look at neck tension as an either/or situation. Either your hunting dangerous game and need significant neck tension along with needing to not stuff a bullet into the lands, or you're in a pure accuracy situation where you may optimize neck tension and bullet seating depth to maximize accuracy. In the ultimate accuracy scenario I think light neck tension is the way to go. I like about .0012 press fit into the neck. With light neck tension and the bullet seated about .005" longer than the round is if it is extracted before firing. In other words, chambering the round pushes the bullet back about .005" into the neck. This works very well with light neck tension.</p><p></p><p>I do my own machine work, and occasionally do machine work for friends. I have several interesting designs and products that are sold through my company "A.R. TACTICAL", My companies web site will be up and running in about 4 weeks. There will be loads of technical information available along with some products like Titanium Rings and Bases that just can not be found anywhere else. The quality of the things I machine is untouchable, we go to great lengths to engineer the PROCESS of making things properly, including better materials selection, and stricter design criteria that takes into account dynamic stress and heat management. Hope to have a semiauto .338 lapua in Titanium for next years Shot Show, light weight, low recoil, low torque, and 1/4 MOA accuracy! Of course the wildcating opportunities will be endless. <img src="http://images/icons/grin.gif" alt="" class="fr-fic fr-dii fr-draggable " style="" /></p></blockquote><p></p>
[QUOTE="Guest, post: 27190"] [b]Re: seat vld\'s to the lands or off a bit?[/b] Rufous.... I like a 30 degree angle from a parallel neck to a parallel free bore area leading to a 1 degree throat. The amount that you place a bullet into the lands is affected by several things, whether you have a 3 groove, 4 groove, or six groove barrel. The angle of your throat, and how tight your free bore area is, will all affect how far into the lands your rifle will prefer the bullet to be. I look at neck tension as an either/or situation. Either your hunting dangerous game and need significant neck tension along with needing to not stuff a bullet into the lands, or you're in a pure accuracy situation where you may optimize neck tension and bullet seating depth to maximize accuracy. In the ultimate accuracy scenario I think light neck tension is the way to go. I like about .0012 press fit into the neck. With light neck tension and the bullet seated about .005" longer than the round is if it is extracted before firing. In other words, chambering the round pushes the bullet back about .005" into the neck. This works very well with light neck tension. I do my own machine work, and occasionally do machine work for friends. I have several interesting designs and products that are sold through my company "A.R. TACTICAL", My companies web site will be up and running in about 4 weeks. There will be loads of technical information available along with some products like Titanium Rings and Bases that just can not be found anywhere else. The quality of the things I machine is untouchable, we go to great lengths to engineer the PROCESS of making things properly, including better materials selection, and stricter design criteria that takes into account dynamic stress and heat management. Hope to have a semiauto .338 lapua in Titanium for next years Shot Show, light weight, low recoil, low torque, and 1/4 MOA accuracy! Of course the wildcating opportunities will be endless. [img]images/icons/grin.gif[/img] [/QUOTE]
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seat vld's to the lands or off a bit?
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