Berger 20 Cal 40gr BT Varmint Rifle Bullets

Berger 20 Cal 40gr BT Varmint Rifle Bullets

The Berger 20 Cal 40gr BT Varmint Rifle Bullets are precision-engineered projectiles crafted for high-volume varmint hunting in .204″ bolt-action and magazine-fed rifles. Featuring a boat-tail (BT) design and a spitzer ogive, these bullets deliver excellent down-range performance, flat trajectories, and consistent accuracy out to 400 yards.

Each Berger 20 Cal 40gr BT Varmint Rifle Bullet is manufactured with a concentric J4 copper-alloy jacket over a precision lead core. Berger’s tight quality control ensures minimal total indicated runout, supporting uniform muzzle velocity and tight group consistency—making them ideal for rapid varmint work without the need for hand sorting.

Key specifications include a bullet diameter of 0.204″, exact weight of 40gr, and sectional density of approximately 0.137. Ballistic coefficients are rated at G1 BC = 0.220 and G7 BC = 0.110. A minimum twist rate of 1:12″ or faster is recommended to fully stabilize these bullets and maintain supersonic flight through typical varmint ranges.

Reloaders value the Berger 20 Cal 40gr BT Varmint Rifle Bullets for their performance with fast-burning powders like Hodgdon CFE 223, Alliant AR‑Comp, or IMR 8208 XBR combined with small rifle match primers. These combinations produce low standard deviation velocities, tight groups, and clean throat conditioning that enhance follow-up shot consistency.

The boat-tail and spitzer ogive reduce drag and wind drift, while maintaining consistent flight characteristics even in light crosswinds. Shooters report reliable feeding, stable trajectories, and reliable fragmentation on thin-skinned game—making the Berger 20 Cal 40gr BT Varmint Rifle Bullets a top choice for serious small-game hunters.