Need Help! Garr alumastar 3 flute carbide endmills 10 and 12mm

I just got some new garr alumastar endmills and would like to know what the best feeds and spindle speeds are on 6061-t6 alloy. Mostly side roughing. Cut depths would also be great.
My spindle speed is 6000 max, 2.5kw

10mm 3 flute
12mm 3 flute
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