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Nielsen 4.5 mm HPDB 15 grain (.178) airgun slugs are cold swaged in a hydraulic press. This process guarantees absolute uniformity in weight, size and shape, resulting in extreme precision.
The hollow point, combined with a soft grade of lead, provides an excellent expansion. Thanks to its bullet shape with dish base, the Nielsen 4.5 mm HPDB 15 grain (.178) airgun slug has a ballistic coefficient of 0.075. The slug has a length of .270” (6.9 mm).