My rifle likes the LEE C312-185-1R
I size them to .311 because my rifles throat is .310
So how does this sound ?

31-195R
Body Diameter: 0.311 (+.0015, -.000)
Bullet Weight: 195 grains
Gas Checked: Yes
Intended Firearm: 1903A3
Special Notes: Bore ride diameter .301 (+.0015, -.000)

Fixed that for you, his tolerance range is 0.0015" not 0.0010" so he can't guarantee to hit 0.301 to 0.302 just slightly too narrow of a window.

Make sure you select the alloy you are using or the closest thing in his drop down list to what you are using. He adjusts the tolerances for the alloy you select so if you ask for a mold to drop 0.311 (+0.0015 -0.0000) from typemetal alloy and then you cast with WW alloy instead it may not hit the tolerance range you specified because the alloy itself can make that much difference. I usually specify WW alloy and then if I want the boolit a little bigger I can always spike my alloy with a little more tin and antimony to push the diameter up a thousandth of an inch or so.

Tom is a master craftsman and he will do his best to give you what you say you want. Just be sure you really want what you think you want.