Re - 5B'ing when super-deep...
Bart Hansen posted this video 2 days ago -
https://www.youtube.com/watch?v=Lrx0ktInAB0.
Good breakdown from him and Doug Polk's opponent, Alex, a regular on the Lodge Live Stream. A lot of the discussion centered around how Doug may have been structuring his 5B range.
What's interesting to me about the hand in OP is that we're playing 1/3, super low stakes, but we're insanely deep, playing $2500 eff with one V, but with the main V being short-stacked by comparison, under $300, which is a pretty typical stack size at these stakes.
CO's $15 open is probably standard for this game, but when he's starting with less than $300, it's pretty predictable that if anyone 3B's him, he's going to be in a 4B-jam or fold situation with a lot of his range.
Because so many 4B's at 1/3 are just all-in jams, there's almost no 5B'ing ever at 1/3, which opens up for debate whether or not we should even have a 5B range, and if so, how we'd structure it, and how you'll play the flop when you'll still have like 3 or 4 SPR.
In the Lodge hand, I understand why Doug would 5B when he's OOP, but I think he made a mistake taking the line he did, both by 5B'ing pre, and by c-betting, then barreling off. His opponent Alex was only giving him a range of AA for value, and some suited AX for bluffs. Even if Doug has KK, too, he doesn't need to c-bet OOP, because his value range is so narrow at that point. He can check and see if Alex wants to bet or give up and check back.
Likewise, I'm not sure what hero would accomplish with a 5B when the CO's jam is for almost 6x hero's 3B size. Hero's hand would be insanely face-up at that point. Even flat calling the $280 jam is insanely strong. BB probably isn't over-calling the jam, much less a 5B, with QQ or worse PP's, and probably not AKo. If BB happens to have AA, he can 6B pre, or just flat call, and let hero blast off post-flop.
The stack depths are too deep in both hands to 5B, because we're too deep to jam pre, and too deep to comfortably jam flop. I think flatting the 4B jam was the correct play.