M14 Forum


M118LR duplication load

This is a discussion on M118LR duplication load within the Ammunition forums, part of the M14 M1A Forum category; Originally Posted by gunny33 Do a Google search for TM 43-0001-27 , Army Ammunition Data sheets. Page 11-23 has the data for M118LR. 44gr of ...


Go Back   M14 Forum > M14 M1A Forum > Ammunition

2Thanks
Reply
 
LinkBack Moderator Tools Display Modes

Old December 29th, 2009, 09:44 AM   #16
Old Salt
 
Sailormilan2's Avatar
 
Join Date: May 2006
Location: Surrounded in Central California
Posts: 1,106
Quote:
Originally Posted by gunny33 View Post
Do a Google search for TM 43-0001-27, Army Ammunition Data sheets. Page 11-23 has the data for M118LR. 44gr of WC750, 175gr bullet, 52,000 PSI, 2640fps. Does not list the primer type.

HTH

Bill
What is WC750? Is that the special M118 powder? If so, what is it's Commercial equivilant?

Sailormilan2 is offline  
Remove Ads
Old December 29th, 2009, 12:31 PM   #17
Master Gunner
 
Join Date: Apr 2009
Location: USA
Posts: 956
Quote:
Originally Posted by Sailormilan2 View Post
What is WC750? Is that the special M118 powder? If so, what is it's Commercial equivilant?
WC750 is a low (lower) density ball powder with a burning rate similar to WC846. It was developed for better (more) case fill, for improved accuracy. It dates to 1995 but was found to be temperature sensitive. M118 Long Range was redesigned in 1997 with a new cartridge case, a new chamber shape and a new powder, Alliant RL-15. The case has a strengthened web area but also slightly increased powder capacity. The chamber shape is designed to ease extraction and prevent case head separation. The pressure limit is 308 Winchester SAAMI max not 7.62x51 M80 military max pressure but this pressure is measured in a M118 Long Range chamber. The M118 Long Range headspace specs are suppose to allow only half the variation of standard head space specs from the "Go" gauge to the "No-Go" gauge, also the chamber shape is unique.

John Coleman is offline  
Old December 29th, 2009, 06:07 PM   #18
Master Gunner
 
Join Date: Apr 2009
Location: USA
Posts: 956
Attached are some cartridge drawings for the M118 and the M118 Long Range.
Attached Files
File Type: pdf C8597555_REV-M(2)M118.PDF (69.2 KB, 120 views)
File Type: pdf C8597555_REV-V(2)M118LR.PDF (81.2 KB, 109 views)

John Coleman is offline  
Old December 29th, 2009, 06:16 PM   #19
Banned Camp
 
Join Date: Dec 2009
Location: Virginia
Posts: 185
M118lr

175gr SMK, 42gr of IMR 4895, LC95 Match brass (full benchrest prep & sort) Federal GM primers. 2650fps from a 24inch barrel.

Citizen 64 is offline  
Old December 29th, 2009, 06:40 PM   #20
Master Gunner
 
Join Date: Apr 2009
Location: USA
Posts: 956
M80

velocity @ 78 ft = 2750 f/s +/- 15 f/s - max S.D. = 20 f/s

max average chamber pressure = 48,000 CUP

max S.D. = 53,000 CUP

extreme temp max individual = 55,000 CUP

average port pressure = 12,500 CUP +/- 2000 CUP

M118 Long Range

velocity @ 78 ft = 2580 fps +/- 15 f/s - max S.D. = 20 f/s

max average chamber pressure = 52,000 CUP

max S.D. = 57,200 CUP

average port pressure = 12,500 CUP +/- 2000 CUP

M852

velocity @ 78 ft = 2550 f/s +/- 15 f/s - max S.D. = 20 f/s

max average chamber pressure = 48,000 CUP

max S.D. = 53,000 CUP

average port pressure = 12,500 CUP +/- 2000 CUP

John Coleman is offline  
Old December 29th, 2009, 07:21 PM   #21
Platoon Commander
 
Join Date: Aug 2006
Location: Finger Lakes Region of NY
Posts: 441
The LC M118LR cartridge was developed in 1997, when Olin (Winchester) had the Lake City concession. The original powder was WC750, a ball powder produced by Winchester. The original round was quite a "hot" load, but very accurate. It is my understanding that the new round did not track properly in the Marine Corp's Unertl scopes, and the charge was reduced. Sierra developed the 175gr MatchKing bullet specifically for this new round. The earliest headstamp I have seen is '98. When ATK (Alliant) took over the running of Lake City in 1999 or 2000, the switch was made to RL15 powder. I have shot '07 M118LR ammo as issued to the Marine Corp out of my 26" barreled FN SPR, and the ammo clocks at 2718fps.

Don

USSR is offline  
Old December 29th, 2009, 08:44 PM   #22
Master Gunner
 
Join Date: Apr 2009
Location: USA
Posts: 956
The M118 Long Range started in 1995 using standard cases and the Sierra 175 grain Match King. The powder used was an WC750 which came from a project that also had another powder called WC749. The powders were developed to be less dense than previous ball powders. There were a lot of issues with the powder and cartridge. A redesign project started in 1997. This end in a redesign of the cae, chamber and pressure limit. It also tested many powders. This resulted in choosing RL-15. Alliant Techsystems (ATK) took over Lake City operations in April 2001.

John Coleman is offline  
Old December 29th, 2009, 10:10 PM   #23
Banned Camp
 
Join Date: Dec 2009
Location: Virginia
Posts: 185
45gr of RL15 with a 175 SMK, LC95 brass, Fed GM primers, does 2730fps from a 24" bolt rifle. 2675fps from my M14 NM.
LC02 M118LR ammo does 2650fps from M14 NM.

Citizen 64 is offline  
Old December 30th, 2009, 06:19 AM   #24
Master Gunner
 
Join Date: Apr 2009
Location: USA
Posts: 956
I might have been off by 2 years. The M118 Long Range looks to date to Oct 1997 but the powder change was at least as early as 1999 and ATK took over Lake City operations in 2001. The powder change was made before ATK ran Lake City.

John Coleman is offline  
Old December 30th, 2009, 06:23 AM   #25
Master Gunner
 
Join Date: Apr 2009
Location: USA
Posts: 956
I measured 42.8 grains of RL-15 in LC-01 and 42.7 grains of RL-15 in LC-03.

John Coleman is offline  
Old December 30th, 2009, 06:52 AM   #26
Banned Camp
 
Join Date: Dec 2009
Location: Virginia
Posts: 185
Quote:
Originally Posted by John Coleman View Post
I measured 42.8 grains of RL-15 in LC-01 and 42.7 grains of RL-15 in LC-03.
I've found the same in 01 and 02 rounds that I've pulled bullets from but I only get 2450-2500fps when I use that wt (42.8grs) of RL-15 from my stock. 45gr of my RL-15 gets me to 2650fps with no signs of even warm pressures.

Citizen 64 is offline  
Old January 5th, 2010, 05:48 AM   #27
Snappin In
 
RePete's Avatar
 
Join Date: Aug 2004
Location: Ontario
Posts: 16
The current M118LR load is 43.1gr RL15 under the 175gr Sierra MK.

The original load was higher but was changed after the start of Iraq when M14's were getting damaged - bent op-rods etc. This load is fine in bolt actions - I use it all of the time.

FWIW: Inspite of what Alliant says, RL15 is temperature sensitive.

RePete is offline  
Old June 21st, 2010, 09:30 PM   #28
Grunt
 
coldshot's Avatar
 
Join Date: Oct 2008
Location: PRK
Posts: 88
Uploaded by someone else. Dated 4/09. Notice the powder is 4064.


coldshot is offline  
Old June 22nd, 2010, 05:33 AM   #29
Dodgin' The Reaper
 
RAMMAC's Avatar
 
Join Date: Nov 2008
Location: Western U.S.
Posts: 7,089

Awards Showcase

Quote:
Originally Posted by coldshot View Post
Uploaded by someone else. Dated 4/09. Notice the powder is 4064.

Using the Net Qty of 149,040 cartridges and a total powder weight of 889 lbs it looks like the M118LR cartridge uses;
Case Federal
Primer Federal 210
Powder IMR 4064 41.75 gr.
Bullet Sierra 175 gr. MK

RAMMAC is offline  
Old December 2nd, 2012, 03:48 PM   #30
Rifleman
 
eodsix's Avatar
 
Join Date: Jun 2010
Location: Arkansas
Posts: 68
Quote:
Originally Posted by coldshot View Post
Uploaded by someone else. Dated 4/09. Notice the powder is 4064.

This is NOT, I say again, NOT the data sheet for M118 Long Range (AA11). This data sheet is for Mk316 Mod 0 (AB39). if someone could find the similar data sheet for AA11, I and I'm sure many others would be very appreciative.

eodsix is offline  
Reply

  M14 Forum > M14 M1A Forum > Ammunition



Search tags for this page
m118 long range powder used
,

m118lr

,
m118lr ammo load
,
m118lr duplication load
,
m118lr load
,

m118lr load data

,
m118lr load data 4064
,

m118lr powder

,
m118lr primer
,
mk 316 mod 0 load data
,
tm 43-0001-27
,
wc750
Click on a term to search for related topics.

Moderator Tools
Display Modes


Similar M14 Forum Discussions
Thread Thread Starter Forum Replies Last Post
Load data request: M118LR duplicate Requiem Ammunition 52 February 18th, 2014 07:55 AM
M1 Carbine Load Development hammonje Steel and Wood 36 January 1st, 2014 08:46 AM
any 444 Marlin shooters out there? Earthquake Lever Action 16 July 12th, 2013 02:15 PM
M852 duplication load coldshot Ammunition 1 December 8th, 2008 05:58 AM
Federal Gold Medal Match Load Duplication DUKE NUKEM Ammunition 29 April 19th, 2005 01:38 AM



Top Gun Sites Top Sites List