Quick Answer
When developing load for .223 varmint rifles, use a chronograph to measure velocity and start with a light charge of 2230s or 25.0 grains of Varget. Increase the charge in 0.1-grain increments, measuring velocity and accuracy at each step. Optimize the load for the best velocity and accuracy.
Choosing the Right Bullet
When selecting a bullet for .223 varmint loads, consider a 55-62 grain hollowpoint or V-Max design. These bullets offer excellent expansion and penetration, making them ideal for taking coyotes and other varmints. For example, the 55-grain Hornady V-Max has a reputation for delivering devastating results at extended ranges.
Load Development Process
Start by seating the bullet 0.050-0.070 inches into the case, leaving sufficient room for the powder to compress. Use a chronograph to measure the velocity of each load, starting with a light charge of 2230s or 25.0 grains of Varget. Increase the charge in 0.1-grain increments, measuring velocity and accuracy at each step. This will help you identify the optimal load for your rifle and cartridge combination. In general, .223 varmint loads tend to peak between 25.0-28.5 grains of Varget.
Powder Selection and Velocity
When selecting a powder for .223 varmint loads, consider a fast-burning propellant like Varget or H4350. These powders offer excellent velocity and burn characteristics, making them well-suited for small-game hunting. For example, a 55-grain bullet loaded with 26.5 grains of Varget can achieve velocities of over 3,200 feet per second, while maintaining excellent accuracy and expansion characteristics.
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