Pete, I too have found my HP5+ films, in home mixed ID11, to be a little too dense when printing. I develop the films at 1+1 and when using the new generation of Ilford's MG paper, but also when using other papers as well, the times needed are a bit longer and the contrast grade a bit lower.
I've kept to the published times on the MDC for the whole of the last made up stock solution, to see how it performs over time. I'll be mixing up a new batch very soon, and will continue to use the film at box speed. I think I will try going at minus 10% of the published development time and see what happens then.
Terry S
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