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Rifles, Reloading, Optics, Equipment
Rifles, Bullets, Barrels & Ballistics
Pros/Cons of 30 vs 40 degree shoulder?
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<blockquote data-quote="elkaholic" data-source="post: 2581917" data-attributes="member: 13833"><p>Some assumptions are being made that all 40 degree shoulders need fire forming, which is not true. If thats the case, then fire forming is a minus. The only other downside is potential feeding issues which are not often a problem with the new magazines, especially DBM's.</p><p>Pros are many, including more capacity in the same body length (to shoulder/neck jct) which equals more velocity.</p><p>Better burning efficiency within the case. (changes pressure curve and facilitates burning of slower powders). Less case stretching which equals better case life with less trimming.</p><p>Better throat life especially when combined with a longer neck, when all else is equal. (pressure and vo;ume)</p></blockquote><p></p>
[QUOTE="elkaholic, post: 2581917, member: 13833"] Some assumptions are being made that all 40 degree shoulders need fire forming, which is not true. If thats the case, then fire forming is a minus. The only other downside is potential feeding issues which are not often a problem with the new magazines, especially DBM's. Pros are many, including more capacity in the same body length (to shoulder/neck jct) which equals more velocity. Better burning efficiency within the case. (changes pressure curve and facilitates burning of slower powders). Less case stretching which equals better case life with less trimming. Better throat life especially when combined with a longer neck, when all else is equal. (pressure and vo;ume) [/QUOTE]
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Rifles, Reloading, Optics, Equipment
Rifles, Bullets, Barrels & Ballistics
Pros/Cons of 30 vs 40 degree shoulder?
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