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  #1  
Old 01-07-2020, 11:27 AM
porthos porthos is offline
 
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Default LC 72 vs. HXP

looking at 240 rnds. of lc72 for $180.0. how do you guys think it compares in accuracy to HXP?
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  #2  
Old 01-07-2020, 12:32 PM
edlmann edlmann is offline
 
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Quote:
Originally Posted by porthos View Post
looking at 240 rnds. of lc72 for $180.0. how do you guys think it compares in accuracy to HXP?
Depends.


IIRC, there's something about later lots of LC M-2 ball having relaxed specs because it was intended only for MG use.
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  #3  
Old 01-07-2020, 01:59 PM
ken792 ken792 is offline
 
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Quote:
Originally Posted by edlmann View Post
Depends.


IIRC, there's something about later lots of LC M-2 ball having relaxed specs because it was intended only for MG use.
LC 72 M2 Ball was waivered to use a slower powder that supposedly would have caused higher port pressure in an M1.

This first link has CMP's reply to the issue typed out, but I haven't seen the original anywhere.

https://groups.google.com/forum/#!to...ns/-2u_p1rOIVM
https://groups.google.com/forum/#!to...ns/GP2ifRgsYdo
http://forums.thecmp.org/showthread.php?t=196463
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  #4  
Old 01-07-2020, 04:30 PM
ntsams ntsams is offline
 
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I have shot hundreds of rounds of LC 72 with no issues. It was all delinked machine gun ammo that was delinked and loaded in clips at RRAD. Put in 30 cal cans with new lot numbers.
There were many complaints that LC 72 seemed hotter than say LC 69. So many that CMP sent samples to H.P. White labs for tests of chamber and port pressures.
The results were published by CMP but I canít find the article.
I did pull down several rounds and it was loaded with 50 to 52 grains of ball powder, I would guess WC852. It also was a little over 100 FPS faster than LC 69.
CMP may be able to provide the lab tests and if I remember it provided great insight to the operation of a M1.
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  #5  
Old 01-07-2020, 06:13 PM
giddy giddy is offline
 
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There were millions of Ball M2 ammo loaded with LC72 headstamp. All were loaded with WC852 powder. Most of the lots used were so slow burning, powder charges required to make spec velocity sometimes took over 61gr. Even though chamber pressures were within spec, port pressures were excessive. Consequently, those ammunition lot numbers were accepted under waiver, and "restricted for MG use only". WC852 loaded ammo can be perfectly suitable for M1 Garand use, but only if the powder charge is less than 54gr. Anyone having LC72 Ball M2 ammo should weigh the original powder charge. If under 54gr, it is compatible with the Garand gas system. If over 54gr, still good ammo, but shoot only in a bolt gun. Not all LC72 ammo is waivered, but most is. Check the powder charge to determine.
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  #6  
Old 01-11-2020, 01:57 PM
Jeremy2171 Jeremy2171 is offline
 
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LC 72 with 58 grn of ball powder shoots fine the garand.
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  #7  
Old 01-11-2020, 03:10 PM
ntsams ntsams is offline
 
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LC72 with over 54 grains will shoot fine in the M1. The problem is elevated port pressures that will probably damage the op rod.
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  #8  
Old 01-11-2020, 04:34 PM
Jeremy2171 Jeremy2171 is offline
 
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Quote:
Originally Posted by ntsams View Post
LC72 with over 54 grains will shoot fine in the M1. The problem is elevated port pressures that will probably damage the op rod.
Well considering the oprod velocity with the over 54grn charge is right where other M2 ball loads are...it doesn't appear to be an issue.
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  #9  
Old 01-12-2020, 11:08 AM
porthos porthos is offline
 
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this ammo was advertised to be at a local gun show this weekend. after your comments; i'll pass. THANKS
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