Nice Kevin.
Our Big Game Rifle Clubs have 2 events specifically for doubles, Stopping Doubles and Stalking Doubles.
Stopping (min calibre .400”, min bullet weight 400gn, min muzzle energy 3900 ft. lb)
@50 metres - 2 shots in up to 5 minutes
@50 metres 4 shots in 16 seconds
@25 metres 4 shots in 16 seconds
all standing unsupported
Stalking (minimum calibre .228”)
@100 metres - 2 shots sitting or kneeling in up to 5 minutes then 2 shots standing unsupported in up to 5 minutes
50 and 25m all standing unsupported
@50 metres - 2 shots up to 5 minutes, then 4 shots in 16 seconds
@ 25 metres - 4 shots in 16 seconds
There are also Dangerous Game (timed and with 'power factor' factored in to score) and other events where doubles are often used and do well.
A lot of fun.