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The article discusses how altering piston weight and cylinder volumes can make an air rifle more efficient. Curiously, the cylinder volume is decreased, and the piston is lightened.
After years of R&D, one airgun technician may have just made the biggest discovery ever in terms of spring-powered airgun design. Simon Everett meets him to find out more… There are many Weihrauch aficionados who’ll tell you the earlier HW77s – those with a 25mm diameter piston – are better t