HSM Game King ammunition in .300 Winchester Magnum (brand part no. 300WINMAG41N) is a hunting camp staple for shooters who want a dependable big-game round. HSM manufactures this load to consistent tolerances, so every box performs the same as the last. At the heart of this load is the 180 gr bullet with a Sierra GameKing design, matched to the .300 Winchester Magnum platform shooters already run. In our rifle ammunition lineup, this is the HSM load built for that job.

Key Specifications

• The chambering is .300 Winchester Magnum, a caliber that has taken game across North America for generations.
• The bullet weighs 180 gr, sized for the terminal performance this load is built around.
• The projectile is a Sierra GameKing design, designed for reliable expansion on game.
• The case is Brass, standing up to repeated firing and easy extraction.
• Each box holds 20 rounds, a practical quantity for a solid range session without restocking mid-way.
• Cases ship 20 boxes to a case, letting range regulars order in volume without repeat checkout.
• Cost works out to about $2.57 per round, a reasonable cost for this level of quality.
• This is a centerfire cartridge, ignited by a replaceable primer rather than a rimfire priming ring.
• Powder and primer are precisely matched to the Sierra GameKing bullet in each caliber, tuned by HSM to maximize accuracy and terminal performance.

Frequently Asked Questions

What game is this .300 Winchester Magnum load suited for? The expanding bullet is built to open on impact, making this a solid choice for deer-class big game within normal .300 Winchester Magnum hunting ranges.

How many rounds come in a box? Each box holds 20 rounds of .300 Winchester Magnum.

Can I order this by the case? Yes, this load ships 20 boxes to a case for shooters who want to order in bulk.

Buy the HSM Game King .300 Winchester Magnum 180 gr Sierra GameKing, 20-Round Box

Whether it’s a weekend at the range or opening morning, this is the load that shows up and does its job. Order from our Lubbock, Texas gun shop and it ships fast to your door.