I've got a red ale bottle conditioning that spent 14 days in primary, 18 in secondary, and 13 days bottle conditioning at about 73 F after being bottled with plenty of sugar per priming calculator.
When I opened a chilled bottle last night and put it in a very cold mug, the beer tasted fine, but was otherwise quite flat i.e. very minimal carbonation.
I inverted all the bottles for a few seconds then turned them back upright and plan to do this every other day for about a week before sampling another bottle.
I used Safale US-05 and the beer was properly fermented, but carbonation is low.
Any other suggestions.