.357 for 9mm (.355)

hammered54 · May 7, 2012, 07:05 PM

a friends dad left him some "stuff" and amongst this "stuff" were some 125 / 147 grain semi Jacketed bullets for an old 38 he no longer has/
well he asked me if I wanted them...I don't own a 38 but do shoot 9mm...could I use them ? would it be safe being a couple of thous larger ?

thanks Matt.

dacaur · May 7, 2012, 07:10 PM

Some guns yes, some guns no. I bought some 9mm gun show reloads long ago that were made using .357 diameter HP's. They ran fine in my ruger p-95 and P-89, but would jam my kel-tec PF9 TIGHT. I had to disassemble it to get the first one out of the chamber, after that I tried to just drop a few more in the chamber and they wouldn't go all the way in....

m&p45acp10+1 · May 7, 2012, 07:22 PM

Make a couple of dummy rounds. If they chamber at proper COL then they should feed just fine. The other thing I can think of is to see if someone that loads for .38 spcl/.357 mag would trade them for some .355 plinkers.

Hammerhead · May 7, 2012, 08:24 PM

I would not use them in 9mm. There is data for .357" jacketed bullets in .38 Super, but I've never seen it for the 9mm.

The 9mm is a tiny, high pressure cartridge and pressure will spike rapidly with any variation in charge weight, bullet seating depth, etc... Using and oversize jacketed bullet would be a huge no-no in my book.

Sport45 · May 8, 2012, 09:38 PM

Take this as an opportunity to buy a .38 or .357mag.

Unless you are talking about several hundred bullets (like maybe a thousand or more) I wouldn't bother trying them in 9mm.

May 7, 2012, 07:05 PM	#1
hammered54 Senior Member Join Date: September 28, 2010 Location: Pinckney,Michigan Posts: 151	.357 for 9mm (.355) a friends dad left him some "stuff" and amongst this "stuff" were some 125 / 147 grain semi Jacketed bullets for an old 38 he no longer has/ well he asked me if I wanted them...I don't own a 38 but do shoot 9mm...could I use them ? would it be safe being a couple of thous larger ? thanks Matt.

May 7, 2012, 07:22 PM	#3
m&p45acp10+1 Senior Member Join Date: May 3, 2009 Location: Central Texas Posts: 3,930	Make a couple of dummy rounds. If they chamber at proper COL then they should feed just fine. The other thing I can think of is to see if someone that loads for .38 spcl/.357 mag would trade them for some .355 plinkers. __________________ No matter how many times you do it and nothing happens it only takes something going wrong one time to kill you.

May 8, 2012, 09:38 PM	#5
Sport45 Senior Member Join Date: May 25, 1999 Location: Too close to Houston Posts: 4,196	Take this as an opportunity to buy a .38 or .357mag. Unless you are talking about several hundred bullets (like maybe a thousand or more) I wouldn't bother trying them in 9mm. __________________ Proud member of the NRA and Texas State Rifle Association. Registered and active voter.

May 7, 2012, 07:10 PM	#2
dacaur Senior Member Join Date: March 16, 2010 Posts: 733	Some guns yes, some guns no. I bought some 9mm gun show reloads long ago that were made using .357 diameter HP's. They ran fine in my ruger p-95 and P-89, but would jam my kel-tec PF9 TIGHT. I had to disassemble it to get the first one out of the chamber, after that I tried to just drop a few more in the chamber and they wouldn't go all the way in....

May 7, 2012, 08:24 PM	#4
Hammerhead Senior Member Join Date: May 31, 2004 Location: Minnesota Posts: 2,432	I would not use them in 9mm. There is data for .357" jacketed bullets in .38 Super, but I've never seen it for the 9mm. The 9mm is a tiny, high pressure cartridge and pressure will spike rapidly with any variation in charge weight, bullet seating depth, etc... Using and oversize jacketed bullet would be a huge no-no in my book.