The Firing Line Forums - View Single Post - Newbie question on LRN vs FMJ-RN OAL

mehavey · March 28, 2012, 08:59 PM

Sierra 5th
9mm Luger
4" barrel
115gr FMJ
OAL 1.100
Unique Powder
Min 4.9gr/1,000fps
Max 6.6gr/1,250fps

Speer 14th
9mm Luger
4" barrel
115gr TMJ
OAL 1.130
Unique Powder
Min 5.6gr/1,161fps
Max 6.3gr/1,244fps

I'd split the differences all-round: OAL=1.15",** Min=5.2gr, Max= 6.4 and stay in the middle of that loading range until comfortable w/ what you are getting.

** assuming the bullet will pass both the magazine length and the full chambering "plunk" tests at that OAL.

March 28, 2012, 08:59 PM	#15
mehavey Senior Member Join Date: June 17, 2010 Location: Virginia Posts: 6,894	Sierra 5th 9mm Luger 4" barrel 115gr FMJ OAL 1.100 Unique Powder Min 4.9gr/1,000fps Max 6.6gr/1,250fps Speer 14th 9mm Luger 4" barrel 115gr TMJ OAL 1.130 Unique Powder Min 5.6gr/1,161fps Max 6.3gr/1,244fps I'd split the differences all-round: OAL=1.15", Min=5.2gr, Max= 6.4 and stay in the middle of that loading range until comfortable w/ what you are getting. assuming the bullet will pass both the magazine length and the full chambering "plunk" tests at that OAL. Last edited by mehavey; March 28, 2012 at 09:04 PM.