9mm luger

Slug the barrel to find out, i'd suggest going with .356", unless measurement of slug proves different, it's good to have the option of diff. sizes to try.
 
You won't know for sure until you try some. Most 9mm's I have loaded for shot best with .357 bulets or .358--but depending on your brass thickness and chamber dimensions they may not chamber. Next best was .356. It also depends on what size bullets you mould will cast--many will only get to .356 and if that is the case--that is what you get. Some times moulds intended for the .38 super cast slightly bigger.

44Bore
 
When shooting cast bullets biger is better. A rule of thumb is to be at least 1/1000 over bore size. That said, I size all my 9MM cast bullets to .357. Works in all my 9MM guns.

I think .358 might be a tad larger than needed.

Take Care

Bob
 
Smallest should be .356, but I have used 357 with good results. Through a Browning P-35 or CZ-75 to even some of my loads of 356 to 357 through a chaps more modern European semi-auto.

Few yrs ago one member was in Vancouver area & about to purchase .355 only they suggest .356 or possibly . 357 for his CZ75.
 
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