I think you should at least give a mention to a spread of 252 HP / 240 SpD / 16 Spe. I never saw much point in the extra speed (since you can't beat Rampardos anyway, Torterra is rare and Misdreavus needs Thunderbolt/special attack investment to break your Sub in less than 3 hits. I guess it matters against max speed Exeggutor but yeah, you get my point). With the added special defense, Braviary takes around 4-5% from most Special hits, which doesn't seem that big until you realize that it actually matters a lot against some very powerful NU threats. Timid Ludicolo's Hydro Pump in rain will never OHKO you after Stealth Rocks, while 252/176+ has a very real (~40%) chance to die. It also lets you take Modest Hydro Pump after at least some of the time instead of it being a guaranteed OHKO. The same can be said about Choice Specs Gardevoir, with 252/240+ surviving Timid Life Orb Thunderbolt after Stealth Rocks around 90% of the time while also surviving Modest around 25% of the time. 252/176+ will only tank Timid Thunderbolt 40% of the time and will always get OHKO'd by Psychic. Life Orb Gardevoir can also be stalled out by 252/240+ Braviary (ignoring crits/Special Defense drops), while 252/176+ doesn't stand a chance of doing so. Choice Scarf Gardevoir also has a small chance to 2HKO 252/176+ with Thunderbolt while 252/240+ can always survive two Thunderbolts. Choice Scarf Solar Power Charizard in sun will also never OHKO 252/240+ Braviary with Fire Blast, while 252/176+ has a 35% chance to faint from the hit. Those cases might seem very unrealistic and/or specific, but I encountered them on ladder more than you'd think, and you just can't leave stuff like that up to a roll with an offensive team where Braviary is your main switch-in for those attacks. Again, I am not asking this to be the main spread, but I want to see a mention of it, at least.
Calcs for anyone who cares:
Anyway, Braviary is a fantastic Pokemon, and this set just showcases that to the fullest degree; it's surprising how many people fail to have a solid check to this beast, and it has pulled me out of tight situations in which I thought that I had the game lost over and over again. This should be one of the most defining sets in the metagame of the upcoming 3 months, for sure.