9mm diameter

[apes]

are all 9mm projectiles.355 or is some of it .356? I got a notice that a supplier has .356 available but I dont want to send a .356 down a .355 barrel if it will cause damage

[golfish]

are all 9mm projectiles.355 or is some of it .356? I got a notice that a supplier has .356 available but I dont want to send a .356 down a .355 barrel if it will cause damage

Lots of both.

[NapalmCheese]

it would be customary for the cast lead projectiles to be .356 or larger.

[NeilMo]

Nothing to worry about using .356" jacketed projectiles. Lead can go even larger without worry. I cast and coat for in 9mm up to .357". I even size to .358" for a few 380's I own.

[jwfire25]

Plated bullets are also usually .356, such as the berry's. Cast .356 or even larger. A lot of jacketed are .355. Your firearm will not be damaged with .356.

Sent from my SM-G960U using Tapatalk

[sonofeugene]

Remember, there is no absolute with dimensions. There are always tolerances to be factored in.

[ysr_racer]

I shoot plated .357, and coated .358 in my 9mm all the time, without any issues.

[Sailormilan2]

If it's plated, or cast, using a .357 bullet would not be harmful, and would probably good for it. I have 2 different brands of US made 9mm barrels, and they run .356+ for 8 barrels. FN HiPower barrels will probably be close to .357+. The only barrel I have that runs close to the nominal .355" is a Rock Island barrel.
Using a jacketed .356 bullet would also be fine. That's what I've been using since it was all I could find, and it simplifies loading by using the same bullets as my 38 Super.

[robert101]

I would ask if you really know the diameter of your barrel? Did you slug it or just looking at bullet diameters and making an inquiry?

[Kokopelli]

My Ruger 9mm barrel slugs .357". With lead projectiles, I cast them .001" over. .355 gives me poor accuracy in my particular gun. If that is what my moulds drop, powder coating fattens them up enough to work well.

With bullets and barrels, size is king.

[noylj]

Jacketed 0.357" bullets have been shot down 9mm Lugers since the cartridge first hit the shores of the US, and I have never had a gun that was sensitive to 0.001" bullet diameter.
Besides, you start at the start load and work up, so even if there was some pressure effect, which I haven't seen after nearly 50 years of shooting 0.357" jacketed bullets in all my 9mm Lugers, it would be just like any other load work up.
You see, when I start loading 9mm Luger in the early '70s, 9mm Luger was NOT popular (It took the S&W M59 to really start folks buying and shooting 9mm—the M39 started it, but an affordable hi-capacity S&W really got things going). Back then, I found more .38 Super cases than 9mm cases at the range. There were no 0.355" bullets at the local gun stores (and no internet to order online), so everyone who didn't want to shoot 130gn 0.356" .38 Super bullets used 0.357" .38 bullets and all were happy. Today, apparently, youth are reinventing everything including history and they all know better than their elders.

[alland]

I have been shooting .357 jacketed and .358 coated bullets in my 9mm guns by the thousands for years. I have many 9mm pistols and they all will chamber and fire the loads with the .358 bullets.

[five.five-six]

Unless it’s a glock because lead bullets of any size will break a glock.

[Sheldon]

Any of you guys run a match chambered barrel and run into issues with the chamber being too tight for the fatter bullets? I had that issue with a match 45acp Barsto barrel on a 1911.

[Mayor McRifle]

Any of you guys run a match chambered barrel and run into issues with the chamber being too tight for the fatter bullets? I had that issue with a match 45acp Barsto barrel on a 1911.

That might have been a crimping issue. Tighter chambers might require that you get all of the flare out of the case.