how should my argyll jacket fit?

[OC Richard]

In the Pipe Band world, many people need a wide range of motion in the arms of their Argyll jackets, for example Drum Majors (here, multiple-time World Champion Drum Major Jason Paguio)

https://www.youtube.com/watch?v=RdU9kda2BBQ

And here, back in 2014, is SFU at The Worlds wearing jackets. You can see the challenges of playing Tenor Drum wearing an Argyll jacket

https://www.youtube.com/watch?v=kNcM5kHh_Jw

St Kilda (Scotland) says they introduced their "Piper Flex" Argyll jackets in 2009, having a back panel of a stretch wool blend, for Pipe Band use. In spite of this I almost never see a Midsection in jackets nowadays, even if the Pipe Corps and Side Drummers are wearing them.

In fact, jackets have fallen almost completely out of use in the Pipe Band world. It's been years since a band in the Grade One Finals at The Worlds has worn them. Nowadays it's waistcoats only, a combination of expense and comfort driving the change.