I hate the methods

We have no idea if partner has 2 or 3
♥, and bidding a grand on AKxxxx opposie Qx is far from clear. While we always think, in the auction, that the choice is 6 or 7 on these hands, it is amazing how often the opps miss slam. Thus partner may well have opened a borderline hand (note that he did not cue 4
♣ over 3
♥). Maybe the opps won't push for slam if partner passes and cannot conveniently show good, in context,
♥ support.
If he held Qxx, then I'd want to try 5
♠ and hope for 6
♣ (the
♣K and
♥Q) and then make the try with 6
♦. But if he holds only Qx
♥, I am happy to be in small slam.
If he holds Qxx Qxx Kxx AKxx, he should have bid 4
♣, not 4
♥. Or with Qxx Qxx KQx AJxx, again a clear 4
♣ call. There are minimums that might not bid 4
♣ and that would still offer a decent play for 7 but few of them contain Qxx of trump.
So I settle for 6
♥, rather than bidding 5
♠.
BTW, I am never going to choose my bid on the basis that partner may have thought that 3
♥ was invitational. if he did, then he will remember next time.
As for my rant re methods: consider how easier this auction would be if you had been able to bid an artificial gf 2
♦ over 1N. If partner has 3
♥, he will bid 2
♥ and you could raise to 3
♥, setting trump and strongly suggesting slam.
If he did not bid 3
♥, you would still bid 3
♥, but you would know that grand was against the odds. I once read, and have long believed that to bid a grand at imps you should expect it to have about a 75% chance of making. Needing a 3-2 split makes it unattractive.
'one of the great markers of the advance of human kindness is the howls you will hear from the Men of God' Johann Hari