Bredli is getting very bitey

[John962]

Hi, I took my bredli out of his viv yesterday and handled him for a few minutes and he was fine. I put him back in the vivarium, and when I tried to change his water he struck at me in feeding mode but luckily missed. I've tried tap training him with a stick before picking him up but he bites that as well! He was such a sweet natured snake when small. Now he is adult size he's getting a bit unpredictable. I'm sure I'm feeding him well, he is certainly not under weight, just always in feeding mode. Any tips?