The Firing Line Forums - View Single Post - Using small magnum pistol primers for 9mm?

SL1 · February 16, 2013, 08:08 PM

The harder ejection with the 115 grain bullets seems to indicate that they are hotter than you really want for you gun. Even if they are not going to blow-up the gun and hurt you, they will probably wear it out more rapidly than ammo that is only as strong as your recoil spring was designed to handle without battering the frame.

One question: Did you use the COLs listed for the particular bullets in the Speer manual? For instance, while Speer's Reloading Manual #14 uses the same data table for both the 115 grain Gold Dot Hollow Point bullet and the Total Metal Jacket Round Nose bullet, it uses an overall cartridge length of 1.125" for the GDHP and 1.135" for the TMJ RN. That 0.010" difference matters with respect to peak pressure.

SL1

February 16, 2013, 08:08 PM	#2
SL1 Senior Member Join Date: November 8, 2007 Posts: 2,001	The harder ejection with the 115 grain bullets seems to indicate that they are hotter than you really want for you gun. Even if they are not going to blow-up the gun and hurt you, they will probably wear it out more rapidly than ammo that is only as strong as your recoil spring was designed to handle without battering the frame. One question: Did you use the COLs listed for the particular bullets in the Speer manual? For instance, while Speer's Reloading Manual #14 uses the same data table for both the 115 grain Gold Dot Hollow Point bullet and the Total Metal Jacket Round Nose bullet, it uses an overall cartridge length of 1.125" for the GDHP and 1.135" for the TMJ RN. That 0.010" difference matters with respect to peak pressure. SL1