The only pressure signs I got was when I went over 3200fps. That was a little primer flow. No hard bolt lift and primers still had rounded edge. This load is on alliant’s website. I think it is safe,just have never got to max load that much short of book load before.
Thanks Hutch
Load data is put together with a certain lot of brass, primer, powder, and bullets, AND SHOT IN A SAAMI SPEC CHAMBER. If any variance exists in these, the result will vary from the data. You said yourself that you used a custom reamer. Without knowing the specs of that reamer, by your results, I'd guess it was a minimum spec reamer.
There are no problems here. You are getting top speed with a few grains less powder. If the accuracy matches your needs, you have a winner. If you want to keep loading hotter, imagining you have a "fast" gun, you are free to do so, but understand that in general, when you are at the velocity for the data, you are usually at the pressure for that data.