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Comparing the 223 & the Swift velocities give you a glimpse of the req'd twist for (really) heavy bullets at Swift design speeds.
223Rem:
90grSMK/2,600fps ~ 6.5 twist for 288,000 RPM (Generally accepted twist for this bullet)
Swift (QL predicts using 26" barrel/full case of N560 powder at 55,000psi)
90grSMK/3,200fps ~ (3200/2600 * 6.5) = 8 twist for same 288,000 RPM
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