Kentmere 100/HC-110 Suggestions Please.

Hi Everyone. I've been using Rodinal 1+100 (9 minutes, standard agitation) to develop Kentmere 100. My results have been OK by my standards although even exposing at iso 50 sometimes the shadows are still a bit thin. I've read a few times that other users prefer HC-110 for this film. I have HC-110 on hand as well so I want to shoot a couple of test rolls to compare. Digital truth didn't have any info except for the 400 speed emulsion. Can anyone suggest a time/dilution to start with? I do have to shoot at iso 50 due to the hard contrasty light here in Southern CA. Thanks.
Regards,
Marc

I would start with a test roll at around 7 1/2 minutes in dilution E.

Tagging this thread since I'll be testing this combination soon.

Rodinal 1+100 (9 minutes, standard agitation)

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For that dilution I think 9min is too little.
Try stand development for 1 hour next time.

BTW, what is your standard agitation? The Koda way, the Ilford way or your way?

Thanks for replies. Ricardo, I arrived at my agitation method based on what I learned in photo classes as well as forums like this. For Rodinal I agitate for a full minute and then three inversion every 30 seconds. I used to use Rodinal 1+50 for Kentmere 100 for 9 minutes but noticed the highlights were blocking up and I just didn't care for the look that this dilution produced in my prints, thus I dropped to 1+100 and kept the same time which worked out a lot better. As far as stand developing, I often develop a roll before heading out to work in the morning so I like to keep my developing times short. Plus, living in LA I have to keep adding small bits of ice in my little bowl of water where I keep the tank during development otherwise the temp could rise quite significantly and affect the results. I'm afraid that I may get distracted while getting ready for work and forget to stay on top of this hence my desire for shorter developing times.

It is quite different from the standard Ilford way that I use: 4 inversions for 10 seconds every minute.
Your way favours shorter times.

If the problem you're trying to solve is thin shadows, I wouldn't think that moving from Rodinal to HC-110 would fix that.

Sounds like an exposure issue to me.