View Full Version : Sizing necessary .358 to .356 ?
Would it be necessary to size a tumble lube .358 cast bullet to .356 to shoot out of my 9mm ? Or are there any advantages. I would be lubing with Alox. Thanks
Calamity Jake
05-07-2009, 11:17 AM
Depends on your 9 and your cases. Load a couple of dummy rounds @ .358 to check for function, if you are using mixed head stamp brass then load many dummy rounds.
If they feed and function fine @ .358 then go for it, if not then try .356
putteral
05-07-2009, 11:22 AM
I do size to .356 in the .358- 105 and 140 gr SWC and they feed fine in my KP 95 and Pt 111 Mill Pro, also tumble lubing.
:castmine:
Recluse
05-07-2009, 11:31 AM
Would it be necessary to size a tumble lube .358 cast bullet to .356 to shoot out of my 9mm ? Or are there any advantages. I would be lubing with Alox. Thanks
You may get some leading, depending upon your alloy, velocity of load and bore diameter.
Additionally, depending on your gun, a .358 diameter boolit may not chamber or may give you feed jam issues. It may bulge your (9mm) cases too much to allow feeding.
:coffee:
Gunslinger
05-07-2009, 12:30 PM
I size mine to .357 which seems to work fine
Cloudpeak
05-07-2009, 12:45 PM
My 9mm's slug at .356" so I size just a shade over .357" with a Lee push through sizer. You might want to slug your bore before sizing. I think most folks shoot for .001 to .002" over bore diameter.
In general, make mine a thou over groove; the "thou over bore" formula can be used for bore riding noses if the bands are still a thou over groove.
I've got a Star A (9mm Largo) with a .354 barrel that likes unsized .357's and .358's. But like mentioned above if the boolit its to long it will bulge the case.
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