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Rifles, Reloading, Optics, Equipment
Reloading
Is there any Downside to a 40* Shoulder ?
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<blockquote data-quote="Coach Hunt" data-source="post: 523128" data-attributes="member: 18430"><p>Howdy Magman,</p><p>Just a few comments from my experience with 40 degree shoulders.</p><p>1) brass flow is reduced somewhat, neck length trimming is reduced</p><p> </p><p>2) yes, powder capacity is increased; however, this is a miniscule increase!</p><p> </p><p>3) yes, the doughnut is very prominent in this shoulder angle. My personal opinion is that this is because MOST of the cutters on neck turners do not have the 40 degree angle built into the shoulder side of the cutter. Sinclair and Forster will custom grind your cutter to this new angle, or supply you with a new one for a minimal charge. When I switched over to this cutter, the doughnut problem thankfully went away.</p><p> </p><p>4) annealing the cases is MUCH, MUCH more critical with a shoulder angle this severe. I use either 550 or 650 degree Tempilaq... 550 one caliber down from shoulder, and 650 right on shoulder... and spin the cases in a torch flame then quenching immediately in a bucket of cold water. Without this annealing every 3 shots or so, case neck life will be very short!!! especially with heavy loads.</p><p> </p><p>Hope this helps, its just what I've discovered over the years working with wildcats and such.</p><p> </p><p>Best to you and good shooting.</p><p> </p><p>Coach</p></blockquote><p></p>
[QUOTE="Coach Hunt, post: 523128, member: 18430"] Howdy Magman, Just a few comments from my experience with 40 degree shoulders. 1) brass flow is reduced somewhat, neck length trimming is reduced 2) yes, powder capacity is increased; however, this is a miniscule increase! 3) yes, the doughnut is very prominent in this shoulder angle. My personal opinion is that this is because MOST of the cutters on neck turners do not have the 40 degree angle built into the shoulder side of the cutter. Sinclair and Forster will custom grind your cutter to this new angle, or supply you with a new one for a minimal charge. When I switched over to this cutter, the doughnut problem thankfully went away. 4) annealing the cases is MUCH, MUCH more critical with a shoulder angle this severe. I use either 550 or 650 degree Tempilaq... 550 one caliber down from shoulder, and 650 right on shoulder... and spin the cases in a torch flame then quenching immediately in a bucket of cold water. Without this annealing every 3 shots or so, case neck life will be very short!!! especially with heavy loads. Hope this helps, its just what I've discovered over the years working with wildcats and such. Best to you and good shooting. Coach [/QUOTE]
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Is there any Downside to a 40* Shoulder ?
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