Today, Edouard Miailhe, of Margaux\u2019s Ch\u00e2teau Siran, said that 2017 was a unique vintage. He believes it's the best vintage from a \u201c7\u201d year since the legendary 1947 bottlings.\r\n\r\nAnd similar to that fateful harvest 70 years ago, Bordeaux 2017 could very well be an unrepeatable vintage. Not because of the frost, which could happen again, but due to the blends crafted by some of the First Growths and many of the lesser wines.\r\n\r\nThe blends found in some of 2017\u2019s top-end wines may never be created again.\r\n\r\nBordeaux wines are almost always a blend. Each winery consistently uses the same blend ratio of Merlot, Cabernet Sauvignon, Cabernet Franc and Petit Verdot\u2014give or take a percent\u2014from year to year. This consistency is what makes wine drinkers become loyal fans of one chateau over another, and compels them to buy every new release.\r\n\r\nLast year\u2019s late spring frost maimed vineyards in very specific locations, leaving many winemakers with an unusual what-to-do situation. In some places, prized parcels of Cabernet Franc were gone; in others, there was significantly less Merlot or Cabernet Sauvignon. Forced to use what they have, winemakers made a different blend. Not different grapes, just different proportions.\r\n\r\nThe blends found in some of 2017\u2019s top-end wines may never be created again.\r\n\r\nAmong the First Growths, Ch\u00e2teau Haut-Brion in Pessac-L\u00e9ognan is, in my assessment, the top of the top for 2017. Forced to use less Cabernet Sauvignon, the bottling will be a blend with 55% Merlot. The result? A wine that is richer than usual and generous for the vintage.\r\n\r\n\r\n\r\nAt Ch\u00e2teau Cheval Blanc in Saint-\u00c9milion, grapes from a parcel of old Cabernet Franc lost to the frost were replaced with those from a young Cabernet Sauvignon plot being used for the first time.\r\n\r\nCh\u00e2teau Ang\u00e9lus, in Saint-\u00c9milion, had less of its famous Cabernet Franc. The 2017 blend is 70% Merlot and 30% Cabernet Franc, instead of their normal 50/50 blend.\r\n\r\nCh\u00e2teau Fourcas Hosten, in Listrac-M\u00e9doc, will have bottlings with more Cabernet Sauvignon than usual as their low-lying Merlot parcels were caught in the frost. The 2017 is composed of 66% Cabernet Sauvignon, while the 2016 was only 45%. The two wines taste radically different.\r\n\r\nWherever there was frost, there will be these differences. Winemakers made changes to their blends to utilize the available resources, dependent on how the dice fell in the vineyard.\r\n\r\nWhen this vintage is bottled and on the market in two years, they will be collectibles. Not always great, but collectible. And while I am not usually a great fan of buying en primeur outside the very best vintages, 2017 is one vintage that will definitely bring a unique story to the glass.\r\nMy 10 Favorite Wines from Pessac-L\u00e9ognan and Graves\r\nWhites\r\nCh\u00e2teau Haut-Brion 2017 Barrel Sample (Pessac-L\u00e9ognan); 95\u201397 points. This impressive wine is rich and full of ripe fruit tones. It is also beautiful, with pineapple and crisp apple notes that are integrated into the wood and spice flavors. It's a great wine that will age over many years. Don't drink before 2022.\r\n\r\nDomaine de Chevalier 2017 Barrel Sample (Pessac-L\u00e9ognan); 94\u201396. Still tight and firmly closed, this has the potential to age for many years. With its concentration, rich apricot and spice flavors, it is rounded while also full of minerality. Drink from 2023.\r\n\r\nCh\u00e2teau Malartic-Lagravi\u00e8re 2017 Barrel Sample (Pessac-L\u00e9ognan); 94\u201396. Rich and warm, this generous wine balances a strongly mineral texture and acidity with ripe quince, apple and pear flavors. It is a wine for aging, likely to be ready to drink from 2023.\r\n\r\nCh\u00e2teau Carbonnieux 2017 Barrel Sample (Pessac-L\u00e9ognan);93\u201395 points. Spice and toast give this wine attractive complexity as well as ripeness. It shows abundant, concentrated yellow-fruit notes as well as a fine texture. It is still very young and will be better from 2021.\r\n\r\nClos Florid\u00e8ne 2017 Barrel Sample (Graves); 91\u201393 points. There is an attractive spicy character at the back of this wine, which brings out the richness of the tropical-fruit flavors and the balance with the wood aging. It should age well, and be ready to drink from 2021.\r\nReds\r\nCh\u00e2teau La Mission Haut-Brion 2017 Barrel Sample (Pessac-L\u00e9ognan); 96\u201398 points. This is a generous, opulent wine with ripe blackberry and hints of spice notes sustained by rich tannins. Juicy and packed with tannins, this will be ready to drink young, but will also age over many years.\r\n\r\nCh\u00e2teau Couhins-Lurton 2017 Barrel Sample (Pessac-L\u00e9ognan); 93\u201395 points. This wine is rich in ripe, juicy black currant notes. Finely integrated tannins already promise ripe fruitiness and a generous future. Drink from 2023.\r\n\r\nCh\u00e2teau la Louvi\u00e8re 2017 Barrel Sample (Pessac-L\u00e9ognan); 92\u201394 points. Dark and dense, this wine has an impressive structure behind concentrated blackberry flavors. It is rich, full and with a fine future. Drink from 2024.\r\n\r\nCh\u00e2teau Bouscaut 2017 Barrel Sample (Pessac-L\u00e9ognan); 92\u201394 points. Ripe and spicy, this wine has great fruit allied to firm tannins. It is juicy, full of black currant flavors and fine, ripe acidity. This wine should age well, drink from 2022.\r\n\r\nCh\u00e2teau Rahoul 2017 Barrel Sample (Graves); 89\u201391 points. Barrel Sample. Juicy and ripe with fine swathes of blackberry fruit, this is bold, fruity wine with generous, full-bodied character. The tannins are soft, indicating this generous wine is likely to mature soon.\r\n\r\nSee more en primeur barrel tasting ratings and reviews.\r\n\r\nLearn more about Roger Voss' first impressions of En Primeur in Day One coverage.\r\n\r\nRead about which white and dessert wines shined at En Primeur in Day Three coverage. \r\n\r\nFind out which wines surprised at En Primeur in Day Four coverage. \r\n\r\nFollow @wineenthusiast on Instagram #WEtasteBDX #EnPrimeur for more of my updates from the frontlines.