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Rifles, Reloading, Optics, Equipment
Reloading
Neck turning...min neck thickness
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<blockquote data-quote="MNbogboy" data-source="post: 1936126" data-attributes="member: 18849"><p>A couple of points;</p><p>1. Depending on your sizing die, turning the necks will affect "neck tension/grip" which in turn may have improved the rounds precision. With bushing dies the same or close to the same thing could have been accomplished with bushing size.</p><p>2. Your annealing has probably had the most influence on not cracking necks.</p><p>Skim turning to remove thin spots in lesser quality brass will actually help prevent neck splitting. Necks will stretch more at the thinner spots. The thinning gets worse with each firing. Sizing/expanding works the thinner spots even more. So yes, turning can help with neck overworking up to a point.</p><p>Turning them thin in a no-turn chamber makes little sense.</p><p>3. Common "less expensive" brass can be checked with a ball-mike for variation and turned accordingly. Sometimes it will not clean up perfect. Neck seal is sometimes affected (usually to the good) by any turning.</p><p>But turning too much with a bullet that is seated shallow in the neck can contort the brass in the pressure cycle to seal farther back and "lift" the case mouth itself causing poor or late seal and carbon buildup. This can be noticed by checking fired cases with a new bullet, the bullet does not want to start in the case mouth or is tight just on the outside of the case mouth.</p><p>4. Also I have found a lot of the brass I use in that .0135 - .0150 category. .0135 is usually where I shoot for and end up but these are for all saami chambers (and that factory stuff is on the saami "big" end.</p><p>My .02,</p></blockquote><p></p>
[QUOTE="MNbogboy, post: 1936126, member: 18849"] A couple of points; 1. Depending on your sizing die, turning the necks will affect "neck tension/grip" which in turn may have improved the rounds precision. With bushing dies the same or close to the same thing could have been accomplished with bushing size. 2. Your annealing has probably had the most influence on not cracking necks. Skim turning to remove thin spots in lesser quality brass will actually help prevent neck splitting. Necks will stretch more at the thinner spots. The thinning gets worse with each firing. Sizing/expanding works the thinner spots even more. So yes, turning can help with neck overworking up to a point. Turning them thin in a no-turn chamber makes little sense. 3. Common "less expensive" brass can be checked with a ball-mike for variation and turned accordingly. Sometimes it will not clean up perfect. Neck seal is sometimes affected (usually to the good) by any turning. But turning too much with a bullet that is seated shallow in the neck can contort the brass in the pressure cycle to seal farther back and "lift" the case mouth itself causing poor or late seal and carbon buildup. This can be noticed by checking fired cases with a new bullet, the bullet does not want to start in the case mouth or is tight just on the outside of the case mouth. 4. Also I have found a lot of the brass I use in that .0135 - .0150 category. .0135 is usually where I shoot for and end up but these are for all saami chambers (and that factory stuff is on the saami "big" end. My .02, [/QUOTE]
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Rifles, Reloading, Optics, Equipment
Reloading
Neck turning...min neck thickness
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