The Firing Line Forums - View Single Post - Does anyone know of quality 9mm JHPs sized .356?

wpsdlrg · January 7, 2013, 07:21 PM

If you are interested in shooting CAST bullets, then going 0.002" over groove dia. (0.357" in this case), generally is no problem. So, don't necessarily get stuck on the notion that you MUST have 0.356" bullets.

With jacketed bullets, it is customary to use ones the same as groove dia. (as you probably already know). Anything larger than groove dia. will increase chamber pressures, usually quite a lot. So, be CAREFUL with this. If your barrel is truly 0.355" (groove), then you SHOULD shoot 0.355" jacketed bullets.

If using light loads, you might get away with 0.356" jacketed....but as I said, be CAREFUL !

January 7, 2013, 07:21 PM	#5
wpsdlrg Senior Member Join Date: August 18, 2009 Posts: 826	If you are interested in shooting CAST bullets, then going 0.002" over groove dia. (0.357" in this case), generally is no problem. So, don't necessarily get stuck on the notion that you MUST have 0.356" bullets. With jacketed bullets, it is customary to use ones the same as groove dia. (as you probably already know). Anything larger than groove dia. will increase chamber pressures, usually quite a lot. So, be CAREFUL with this. If your barrel is truly 0.355" (groove), then you SHOULD shoot 0.355" jacketed bullets. If using light loads, you might get away with 0.356" jacketed....but as I said, be CAREFUL !