.257 Blackbird
Also called the .250-7 Blaser. Built to match .257 Weatherby speed without belted brass, using heavy high-BC .25 bullets for long-range deer, pronghorn and elk.
Good for: Varmint, Deer/hog, Elk/moose
A typical factory load is a 131 gr Blackjack ACE bullet at about 3,400 ft/s, with roughly 3,362 ft-lbs of energy at the muzzle.
Typical load
131 grBlackjack ACEMuzzle speed
3,400 ft/sMuzzle energy
3,362 ft-lbsTypical BC (G1)
≈ 0.66typical, varies by brandTwist rate
1:7for 131+ gr bulletsPractical range
500–600 ydPoint-blank range
295 yd4" vital zoneRecommended platform
Standard to heavy rifle, 8 lb+Stout recoil; use a good pad or brake in a light rifleOn the Hunting Rifle Cartridges chart
Made to hunt
Also called the .250-7 Blaser. Built to match .257 Weatherby speed without belted brass, using heavy high-BC .25 bullets for long-range deer, pronghorn and elk.
Typical load
131 grBlackjack ACE
Typical muzzle fps
3,400ft/s
Typical muzzle energy
3,362ft-lbs
Typical BC (G1)
≈ 0.66typical, varies by brand
Twist rate for typical load
1:7for 131+ gr bullets
Effective ethical range
500–600 yd
MPBR
295 yd4" vital zone · Near zero 37 yd · Far zero 252 yd · Min PBR 0 yd · Max PBR 295 yd · Sight-in @100 1.65" high
Recommended platform
Standard to heavy rifle, 8 lb+Stout recoil; use a good pad or brake in a light rifle
Open the full Hunting Rifle Cartridges chart →
On the Wildcats chart
Made for
Also called the .250-7 Blaser. Built to match .257 Weatherby speed without belted brass, using heavy high-BC .25 bullets for long-range deer, pronghorn and elk.
Typical load
131 grBlackjack ACE
Typical muzzle fps
3,400ft/s
Typical muzzle energy
3,362ft-lbs
Typical BC (G1)
≈ 0.66typical, varies by brand
Twist rate for typical load
1:7for 131+ gr bullets
Practical range
500–600 yd
MPBR
295 yd4" vital zone · Near zero 37 yd · Far zero 252 yd · Min PBR 0 yd · Max PBR 295 yd · Sight-in @100 1.65" high
Recommended platform
Standard to heavy rifle, 8 lb+Stout recoil; use a good pad or brake in a light rifle
Open the full Wildcats chart →
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Speed, energy and BC are typical figures for the listed load; real numbers vary by brand, lot and barrel length. Always check the ammo maker's data for your exact load.