Be careful with Dram Calculator. It's a tool, it's not Gospel. It'll only give you numbers as to what others have proven, and others have surmised as to what's possible, not what's probable.
So you probably will still need to make some adjustments as your particular ram is not the same ram others used.
Look to see exactly what was really changed from original. The new numbers will be a best case scenario, not a guarantee. On my ram, I ended up leaving the Primary timings alone, setting command rate to 1T and keeping the Secondary timings as figured. Tertiary timings I left on Auto.
This is why Dram Calculator isn't liked by some ppl, they just don't get that it's only an idea of possible, they believe it should be a guarantee probable and therefore get disappointed when the new numbers just don't automatically work.
Tightening timings is OC. There are no guarantees with Any OC.