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Rifles, Reloading, Optics, Equipment
Rifles, Bullets, Barrels & Ballistics
Twist Rate for 300gr SMK's in 338/300 RUM?
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<blockquote data-quote="Shawn Carlock" data-source="post: 92863" data-attributes="member: 4"><p><strong>Re: Twist Rate for 300gr SMK\'s in 338/300 RUM?</strong></p><p></p><p>I mostly use 30" Hart barrels 1-10 twist with the 300 gr SMK, H1000, Retumbo, or RL25. 2900 fps or so. I have yet to build on of these that won't go under 1" @ 300 yards. I don't tight neck them, I don't believe that it is a great benefit here for the extra work. I use minimum spec demensions for the 338 Ultra in the neck area. Some guys neck down 375 Ultra and then turn the necks. I have run oal's from 3.685" to 4.000" and seen less than 50 fps difference in velocity when seated to the lands. I would give the wildcat bullets a try I used some of the 300 gr.WC bullets with great results. I keep bitching that Nosler doesn't make a 280-300 gr. Accubond, that would be hot.</p></blockquote><p></p>
[QUOTE="Shawn Carlock, post: 92863, member: 4"] [b]Re: Twist Rate for 300gr SMK\'s in 338/300 RUM?[/b] I mostly use 30" Hart barrels 1-10 twist with the 300 gr SMK, H1000, Retumbo, or RL25. 2900 fps or so. I have yet to build on of these that won't go under 1" @ 300 yards. I don't tight neck them, I don't believe that it is a great benefit here for the extra work. I use minimum spec demensions for the 338 Ultra in the neck area. Some guys neck down 375 Ultra and then turn the necks. I have run oal's from 3.685" to 4.000" and seen less than 50 fps difference in velocity when seated to the lands. I would give the wildcat bullets a try I used some of the 300 gr.WC bullets with great results. I keep bitching that Nosler doesn't make a 280-300 gr. Accubond, that would be hot. [/QUOTE]
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Twist Rate for 300gr SMK's in 338/300 RUM?
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