Practising the small Doubles
I've never considered my 27g darts to be particularly heavy. They certainly look like the ones most other players seem to throw, but over the last few years I've noticed how the 25g+ weights are slowly being phased out.
I switched to Unicorn Hero when Harrows scrapped the 27g option in their excellent Magnum range. Now Unicorn are themselves putting a 25g ceiling on most of their range, including the Heros. I can still find some 27g sets on-line, but these are end of stock and will need to be bought quickly if I want any spares.
I'm sure I'll always be able to get darts in the 27g weight, but my choice will be limited to lower tungsten ratios and not manufactured by Unicorn, Harrows etc. To see what I mean have a look at Darts Corner, and do searches on Darts Steel-Tip / By Weight and see the difference between the 25g offerings and the 27g ones.
The 27's must have been phased out due to declining demand, but it'll be a shame if I'm forced down to 25g to get the type of darts I want. I can really feel the 2g difference.