While air rifle slugs have been around for quite a few years, they seem to have enjoyed a massive boost in popularity over the past 18 months or so, possibly because there seems to be a corresponding increase in popularity in the number of air rifles operating at FAC levels.
And while it was the norm not that long ago to have an FAC rifle running anywhere from 26 to 30 foot pounds in .22, there’s now a staggering choice of power levels and calibre options, with air rifles with a muzzle energy of 80 foot pounds or even higher no longer being unusual.