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Rifles, Reloading, Optics, Equipment
Rifles, Bullets, Barrels & Ballistics
Cranking up the RPM
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<blockquote data-quote="Swamplord" data-source="post: 2049142" data-attributes="member: 2460"><p>the straight necked up 358 RPM should mimic the 358 Norma Magnum, case capacities are withing a grain or two of each other, if you improve the taper you'll gain some more capacity and be right on the heels of the 358 STA</p><p></p><p>I used the tapered exanders in hornady FL sizing dies and K&M exander mandrels for their neck turner, all cases were sized up in same order to move as little material as possible per sizing until reaching desired caliber neck diameter, that way necks remain even in thickness and there is no thinning/thickening creating out of round necks, as follows</p><p>7mm Rem Mag Hornady FL die</p><p>300 Win Mag Hornady FL die</p><p>8mm K&M expander</p><p>338 Rum Hornady die</p><p>358 K&M expander </p><p>375 Ruger Hornady die</p><p>408 K&M expander</p><p>416 K&M expander</p><p></p><p>used Redding Imperial sizing wax for every step to insure even expansion</p></blockquote><p></p>
[QUOTE="Swamplord, post: 2049142, member: 2460"] the straight necked up 358 RPM should mimic the 358 Norma Magnum, case capacities are withing a grain or two of each other, if you improve the taper you'll gain some more capacity and be right on the heels of the 358 STA I used the tapered exanders in hornady FL sizing dies and K&M exander mandrels for their neck turner, all cases were sized up in same order to move as little material as possible per sizing until reaching desired caliber neck diameter, that way necks remain even in thickness and there is no thinning/thickening creating out of round necks, as follows 7mm Rem Mag Hornady FL die 300 Win Mag Hornady FL die 8mm K&M expander 338 Rum Hornady die 358 K&M expander 375 Ruger Hornady die 408 K&M expander 416 K&M expander used Redding Imperial sizing wax for every step to insure even expansion [/QUOTE]
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Rifles, Reloading, Optics, Equipment
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Cranking up the RPM
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