6 years ago 2 years ago

BC For The 225gn Sierra Bullet

by Nick Harvey 6 years ago2 years ago

Q: The Sierra .35 calibre 225gn spitzer boattail bullet has proved extremely accurate in my Mauser 98 in .35 Whelen. With a maximum charge of 55gn of AR2206H I am getting less than minute-of-angle accuracy at 2555fps. What is the ballistic coefficient of Sierra’s stream lined bullet, and how does its sectional density compare with bullets of other calibres?

Ian Armstrong

A: The ballistic coefficient of the Sierra bullet your Mauser shoots tight groups with is .385 at velocities of 2400fps and

faster. Its sectional density of .250 compares closely with those of the following calibres and weights: 270/130gn(.242); 7mm/140gn (.248); .308/165gn (.248; and .338/200gn (.250).

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Posted by Nick Harvey

The late Nick Harvey (1931-2024) was one of the world's most experienced and knowledgeable gun writers, a true legend of the business. He wrote about firearms and hunting for about 70 years, published many books and uncounted articles, and travelled the world to hunt and shoot. His reloading manuals are highly sought after, and his knowledge of the subject was unmatched. He was Sporting Shooter's Technical Editor for almost 50 years. His work lives on here as part of his legacy to us all.