[hawkburger]

I use the dia. of cutter to set the max amounts for toolpath depth and width.
Usually going for 100% depth x 50% width.; preferably
but for slots it would be vice versa. 50% for depth and 100% for width O.K.?
depth. = 50%of cutter dia. for depth of cut. x 100% for width of cut.
(and vice-versa.)
So for contouring it's 100% of cutter for "depth" x 50%of cutter for "width" of cut.(Preferred)
Slotting : Start a Ramp angle 3deg.(5deg. if you want to max output) "zig-zag" and "criss-cross" down to 1/8 deep. Feed rate 50% of linear feed(5.0 I.P.M.).
'Zig Zag' and 'criss cross' gets to depth with less downward (Plunging) force. and cuts without rubbing the center of tool as much as constant circular ramping.
"As long as the ramp strokes are 200% larger than the tool dia." (1 inch)
This allows for Chip evacuation!!!!!!!
This saves the work hardening of Matl. for further machining ease.
When the ramping is at 50% of tool dia. deep. then linear feed 10.0 I.P.M.
My speed for 302 stainless with tialin Carbide = 165 SFM 1/4 mill tialin
2521 R.P.M.
.004 feed per rev. = 10 inches per minute.
( Small slots ramp-cut with 3-flute flat endmill 50 % Feedrate)
That cuts a .125deep slot 1/4 inch wide 10 inches long in one minute.
If you want high speed machining try using Rounded ball endmills not flat ones for rough milling slots.
My tools cost money and I have plenty of time, just not alot of money.