Weatherby 6.5-300 Weatherby Magnum 129gr Hammer Custom ammunition comes in a 20-round box (Weatherby part no. M653129HCB) loaded for hunters shooting rifles chambered in 6.5-300 Weatherby Magnum. Weatherby lists this 129-grain load at 3450 fps and 3409 ft-lbs of muzzle energy, with a G1 ballistic coefficient of .510. Weatherby describes the Hammer Custom bullet as a solid copper design turned on a CNC lathe, with a hollow point that sheds petals on impact while the rest of the bullet stays intact. Weatherby also lists this load as lead free. Each box gives you 20 factory-loaded rounds of 6.5-300 Weatherby Magnum to sight in a rifle and carry into the field.

Key Specifications

• Chambering is 6.5-300 Weatherby Magnum, the designation Weatherby lists for this load and the cartridge your rifle needs to be chambered for.
• Bullet weight is 129 grains, the weight Weatherby lists for this Hammer Custom load.
• The bullet is the Hammer Custom, the projectile Weatherby chose for this 6.5-300 Weatherby Magnum load.
• Each box holds 20 rounds, the full count that comes with this listing.
• Muzzle velocity is listed at 3450 fps, the starting point of Weatherby’s velocity table out to 500 yards.
• Muzzle energy is listed at 3409 ft-lbs, the figure Weatherby gives before the bullet starts shedding energy downrange.
• The G1 ballistic coefficient is .510, a measure of how well the bullet holds its velocity against drag.

Frequently Asked Questions

Is this load lead free? Yes. Weatherby lists this load as lead free.

What bullet does this 6.5-300 Weatherby Magnum load use? It uses a 129-grain Hammer Custom bullet. Weatherby describes it as a solid copper bullet turned on a CNC lathe, with a hollow point that sheds petals on impact while the remainder of the bullet stays intact. Each bullet is weighed and micrometer measured during production.

How many rounds are in the box? Each box holds 20 rounds of 6.5-300 Weatherby Magnum ammunition.

Buy the Weatherby 6.5-300 Weatherby Magnum 129gr Hammer Custom Rifle Ammunition, 20-Round Box

This 129-grain Hammer Custom load is one of the factory options Weatherby makes for the 6.5-300 Weatherby Magnum. Order it from our Lubbock, Texas gun shop for fast, direct shipping, and check the rest of the Weatherby lineup and our ammunition category too.