Would be curious to hear what your favorite 6mm/3031 load is.
3031 seems pretty fast for use in a 6mm. 4831, or similar, generally provides better performance, at lower, more predictable, pressures. I was a fan of the 95 gr Partition in my 6mm.

3031 is a favorite of mine under a 200 grain bullet in 35 Whelen.

Imagine your grave on a windy winter night. You've been dead for 70 years.
It's been 50 since a visitor last paused at your tombstone.....
Now explain why you're in a pissy mood today.