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Rifles, Reloading, Optics, Equipment
Rifles, Bullets, Barrels & Ballistics
6.5 rum?
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<blockquote data-quote="hammertyme" data-source="post: 634867" data-attributes="member: 12863"><p>Not sure how one would get an efficient powder burn and corresponding velocity fom a Rum case necked down. A long barrel would help for sure.</p><p> </p><p>Stepping a 06 case down to 6.5 with a 40 degree AI type shoulder created pressures before I got the velocities I wanted. On a WSM case it would even be worse.</p><p> </p><p>One could either have a reamer made that moves the shoulder forward and keeps close to the current shoulder angle . Or: I ran the 6.5X270WSM reamer in an extra .050 as well as went in and cut the throat deeper so I could seat the bullet so the base of the 130gr bullet was even with the bottom of the case neck thus all the case capacity could be utilized. I use regular 6.5WSM sizing dies without issue.</p><p> </p><p>I easily get 3100fps from a 19" barrel and Rel 17 or H4831sc</p><p> </p><p>Neal</p></blockquote><p></p>
[QUOTE="hammertyme, post: 634867, member: 12863"] Not sure how one would get an efficient powder burn and corresponding velocity fom a Rum case necked down. A long barrel would help for sure. Stepping a 06 case down to 6.5 with a 40 degree AI type shoulder created pressures before I got the velocities I wanted. On a WSM case it would even be worse. One could either have a reamer made that moves the shoulder forward and keeps close to the current shoulder angle . Or: I ran the 6.5X270WSM reamer in an extra .050 as well as went in and cut the throat deeper so I could seat the bullet so the base of the 130gr bullet was even with the bottom of the case neck thus all the case capacity could be utilized. I use regular 6.5WSM sizing dies without issue. I easily get 3100fps from a 19" barrel and Rel 17 or H4831sc Neal [/QUOTE]
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6.5 rum?
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