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Rifles, Reloading, Optics, Equipment
Rifles, Bullets, Barrels & Ballistics
300RUM brass life????????
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<blockquote data-quote="barry206" data-source="post: 28064" data-attributes="member: 1257"><p>JustC,the 300rum is a tempermental sob.After reading Darryls remarks on the Tomohawk,the shoulder angle change may be the way to go.</p><p> To get me going in the right direction I purchased a Redding instant indicator in 300rum.This allowed me to see exactly where the headspace was located in relation to the dummy round.Mine was .007 longer than the dummy before I could feel contact with the shoulder[firing pin out]I have to bump the shoulder back to .002 after each firing or the bolt wont open..[005 headspace]The headspace measured .001 after firing.In other words necksizing was out of the question.I use the type s full lenght die now,sizing about half the neck.You can not partial resize this round.When you squeeze the sides of the brass and dont bump the shoulder,you actually make the brass longer decreasing headspace.Or I guess I should say I cant.You can see this clearly using the indicator.As for brass life,after about three firings I can tell the primer pockets are loosening up.Ive been doing 5 loads then trashing them after I had case head seperation on the 7th firing a while back.</p><p> I bought a new Rem police model two years ago.After only getting 1.250in groups I decided to put a shilen match barrel on.Dont get me wrong,it shoots great.I just cant get nowhere near max loads as has been printed. 85grs of H-4831 will push a 175 berger at 3336 and a stiff bolt.89grs of H-1000 will push a 200SMK 3220fps.After firing this I trashed that piece of brass,I could put the primer in by hand.Needless to say my loads are down a bit now but this round isnt for the easily ****ed-off.Has anyone eles had this happen with a Shilen barrel?</p></blockquote><p></p>
[QUOTE="barry206, post: 28064, member: 1257"] JustC,the 300rum is a tempermental sob.After reading Darryls remarks on the Tomohawk,the shoulder angle change may be the way to go. To get me going in the right direction I purchased a Redding instant indicator in 300rum.This allowed me to see exactly where the headspace was located in relation to the dummy round.Mine was .007 longer than the dummy before I could feel contact with the shoulder[firing pin out]I have to bump the shoulder back to .002 after each firing or the bolt wont open..[005 headspace]The headspace measured .001 after firing.In other words necksizing was out of the question.I use the type s full lenght die now,sizing about half the neck.You can not partial resize this round.When you squeeze the sides of the brass and dont bump the shoulder,you actually make the brass longer decreasing headspace.Or I guess I should say I cant.You can see this clearly using the indicator.As for brass life,after about three firings I can tell the primer pockets are loosening up.Ive been doing 5 loads then trashing them after I had case head seperation on the 7th firing a while back. I bought a new Rem police model two years ago.After only getting 1.250in groups I decided to put a shilen match barrel on.Dont get me wrong,it shoots great.I just cant get nowhere near max loads as has been printed. 85grs of H-4831 will push a 175 berger at 3336 and a stiff bolt.89grs of H-1000 will push a 200SMK 3220fps.After firing this I trashed that piece of brass,I could put the primer in by hand.Needless to say my loads are down a bit now but this round isnt for the easily ****ed-off.Has anyone eles had this happen with a Shilen barrel? [/QUOTE]
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300RUM brass life????????
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