What secondary bevel do you folks use when sharpening the irons for your #4 smoothing planes?

I always did 25° and 30° for my #4, #5 and #7 (basically all my main planes) but my #4 often sees some "rougher" work than my jointer or my Record jack plane (my baby).

Anyway, today I was planing a door that someone had driven a nail into and nicked the BEJESUS outta the iron on my #4. OUCH!

After spending 40 min on the diamond plate and waterstones, I'm wondering whether I ought to go to 25° and 35° or something like that for the #4.

Any thoughts?

Thanks,

Jacob