Having just found a tin of awful JSB Exacts (.177) with damaged skirts, I have spent a little while 'mending' the skirts to give plinking pellets. My mender was a simple round head plastic map pin stuck in the end of a bit of wood. Worked fine.

Incidentally I use the same map pins, but stuck in the end of a bit of dowel to seat pellets into the magazines for CO2 pistols. You need to arrange the pins in the correct spacing... 8 for the Walther clones, 10 for the S&W. Works perfectly.

Cheers, Phil