Description
The Swift Scirocco II in 6mm/.243 is a 90-grain bonded bullet with the Signature Black Tip, and it's one of the few premium hunting projectiles in this diameter that gives handloaders both long-range reach and serious terminal toughness. The lead core is bonded to a thick, pure copper jacket (not an alloy blend), which is the whole reason this bullet holds together and keeps its weight after it hits bone. Swift lists it at a .419 G1 ballistic coefficient with a .218 sectional density, and that slick boat-tail spitzer profile is what keeps the trajectory flat and the energy up when the shot stretches out past comfortable iron-sight range.
What Sets the Scirocco II 6mm Apart
The polymer tip does double duty here. It protects the nose and keeps the aerodynamic shape intact in the magazine, then drives expansion open even at the lower velocities you'll see at distance. Up close where impact speed is high, the bonded core and progressively tapered jacket keep expansion controlled so you don't lose the bullet to fragmentation. Swift's bonding process typically returns weight retention in the 80 percent range, which is why folks running this bullet on deer, pronghorn, and even elk in a hot .243 or 6mm cartridge tend to find their recovered bullets heavy and well-mushroomed.
Loading the 90-Grain Scirocco II BTS
This is a proven handloading component with load data published across a wide range of 6mm cartridges, from the 6mm ARC and 6mm Remington on up to the .243 Ackley and wildcats. The semi-spitzer nose profile is built to shrug off recoil battering in the magazine without deforming, so your rounds stay consistent box to box. Shooters running fast .243 and 6mm Creedmoor builds have reported real-world muzzle velocities north of 3,100 fps with good standard deviations, which translates to tight groups and predictable drops downrange.
If you want a 6mm bullet that behaves like a target projectile on paper but performs like a big-game bullet on impact, the Scirocco II checks both boxes. It's a dependable all-around choice for medium game out of your .243 or 6mm handloads.
Key Specifications
- Manufacturer: Swift Bullet Company
- Caliber: 6mm / .243
- Bullet Diameter: 0.243"
- Bullet Weight: 90 grain
- Bullet Style: Scirocco II BTS (Boat Tail Spitzer, Polymer Tip)
- Construction: Bonded lead core with pure copper jacket
- Ballistic Coefficient (G1): 0.419
- Sectional Density: 0.218
- Quantity: 100 count
- Manufacturer Part Number: 720908
- UPC: 713351720908
What’s Included
- 100 Swift Scirocco II 6mm/.243 90gr BTS bonded bullets
Frequently Asked Questions
Is the Swift Scirocco II 6mm a bonded bullet?
Yes. The Scirocco II uses a lead core bonded to a thick, pure copper jacket using Swift's proprietary process. That bonding is what keeps the core and jacket together on impact and gives the bullet its high weight retention, which typically runs in the 80 percent range.
What game is the 90-grain Scirocco II good for?
It's a versatile medium and big-game bullet. In a .243 or 6mm cartridge it's a strong choice for deer, pronghorn, and similar game, and plenty of hunters have used it successfully on elk when loaded hot. The bonded construction gives you deep penetration while the polymer tip drives reliable expansion at distance.
What's the ballistic coefficient on the 6mm 90-grain Scirocco II?
Swift lists it at a .419 G1 ballistic coefficient with a .218 sectional density. That streamlined boat-tail profile keeps the trajectory flat and helps the bullet retain velocity and energy downrange, which makes it well suited to flat-shooting 6mm and .243 cartridges.
What cartridges can I load these bullets in?
This .243-diameter bullet works across a wide range of 6mm cartridges, including the 6mm ARC, 6mm Remington, 6mm Creedmoor, .243 Winchester, and various wildcats. Published load data exists for a large number of 6mm chamberings, so you'll have plenty of recipes to work from.





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