Need some advice on bullet sizer

[Nimbus3000]

I have just completed a casting (Cerrosafe) on my 9mm and have determined the dimensions of the lands to be 0.357 and the grooves to be 0.351 +/- (had a hard time measuring the grooves). I am going to purchase a Lee push through sizer and would like some advice on what size to order. I will be powder coating my cast bullets before sizing. Thanks.

[tryNto]

What size are your Boolits as Cast?

@.357 you will want .358 I do believe.

[Nimbus3000]

Actually have not yet cast any. Still waiting for the mold to show up. Will be casting into a Lyman # 356402 mold.

[Nimbus3000]

Just dawned on me that I forgot that the cast is a mirror of the barrel. Should have said that the grooves are .357 and the lands are .351 +/-.

[tazman]

A lot depends on the chamber dimensions of your particular barrel. I would try sizing at .358 but would see if they will pass the drop test with your barrel before I sized a lot of them.
My 9mm barrels are very near the same size as yours. I shoot .358 in mine with good results. I have Beretta barrels and the chambers are a bit on the loose side so I can drop almost anything in there.