Now that I have it, what cocktail s can I use them in?

Any ideas? Thanks!

Pretty straightforward but my usual rum mix for a Nutty Painkiller is 2ozs of Navy with 1/2oz of Dark so your combo sez "Painkiller" to me.

You might try subbing the Hamilton for the Privateer in the By Way of the Dodo, which I found at Cocktail Virgin.

1 oz Green Chartreuse (3/4 oz)
1 oz Lime Juice (3/4 oz)
1 oz Passion Fruit Syrup (3/4 oz)
1 oz Privateer Navy Yard Rum (3/4 oz)

Or, you could test my Hamo Blamo, created with the help of tikiskip and MadDogMike. (I don't have any navy strength rum, so I've never actually tried it myself....)

1 oz Plantation O.F.T.D. Overproof Rum
1 oz Lost Spirits Navy Style Overproof Rum
1 oz Lemon Hart 151 Overproof Rum
1 oz lime juice
1 oz ginger syrup (not liqueur)
1/2 oz simple syrup
1/2 oz grenadine
4 oz club soda
1 dash Angostura bitters
1 dash orange bitters

They're both fine choices for Don and Vic-style navy grogs. I usually use 1 1/2 oz each Navy strength and light Puerto Rican rum.

Thanks for the tips. Just made a Hamo Blamo I like it! Next up Navy Grog.