MEN 56 Grain M193 Accuracy From An AR-15

Molon

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Feb 26, 2020
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MEN 56 Grain M193 Accuracy



men_m193_box_label_02-1999752.jpg




Yes, you read that title correctly. The M193 ammunition manufactured by MEN (Metallwerk Elisenhütte GmbH) has a 56 grain bullet.

“But Molon,” you say. “How can this be M193 if it doesn’t have a 55 grain bullet?”

Well, if you look at the mil-spec drawing for the M193 projectile, you’ll see that the weight specification for the copper jacket of the bullet is 17.5 grains, with a tolerance of minus 1.0 grains. Also, the lead slug for the projectile has a weight specification of 38.5 grains, with a tolerance of minus 1.0 grains. Take the 17.5 grains for the jacket, add it to the 38.5 grains for the lead slug and we have a total weight for the projectile of 56 grains (with a total tolerance of minus 2.0 grains). So, as long as the bullet doesn’t weigh more than 56 grains, it technically meets the weight specification for M193.



men_56_grain_bullet_on_scale_02-1999599.jpg




The 56 grain MEN M193 bullet is approximately 0.030” longer than a typical American manufactured M193 bullet.



men_56_grain_m193_bullet_comparison_01-1999601.jpg




This ammunition is loaded in brass cases with the annealing iris still visible. The case mouth has asphalt sealant and is crimped into the cannelure of the bullet. This ammunition is charged with “ball” powder.


men_m193_cartridge_01-1999604.jpg




Each red square in the grid below is 1/10th of an inch.

men_m193_powder_01-1999606.jpg




The case-head stamp of the lot of this ammunition that I tested reads:

5,56x45

MEN16

The primer pocket has a healthy dose of sealant. Strangely enough, the primer pockets are not crimped, which technically means this ammunition does not meet the US mil-spec for M193.


men_m193_case_head_01-1999605.jpg




Accuracy


The US accuracy specification for M193 cited in MIL-C-9963F is as follows:

The average of the mean radii of all targets of the sample cartridges, fired at 200 yards, shall not exceed 2.0 inches.

These averages are from 10-shot groups fired from machine rested, bolt-actioned, heavy test barrels. All things being equal this specification equates to a mean radius of 1 inch at 100 yards (the distance at which I tested this ammunition).

I conducted an accuracy (technically, precision) evaluation of the MEN 56 grain M193 ammunition following my usual protocol. This accuracy evaluation used statistically significant shot-group sizes and every single shot in a fired group was included in the measurements. There was absolutely no use of any Group Reduction Techniques (e.g. fliers, target movement, Butterfly Shots).

The shooting set-up will be described in detail below. As many of the significant variables as was practicable were controlled for. Also, a control group was fired from the test-rifle used in the evaluation using match-grade, hand-loaded ammunition; in order to demonstrate the capability of the barrel. Pictures of shot-groups are posted for documentation.

All shooting was conducted from a concrete bench-rest from a distance of 100 yards (confirmed with a laser rangefinder.) The barrel used in the evaluation was free-floated. The free-float handguards of the rifle rested in a Sinclair Windage Benchrest, while the stock of the rifle rested in a Protektor bunny-ear rear bag. Sighting was accomplished via a Leupold VARI-X III set at 25X magnification and adjusted to be parallax-free at 100 yards. A mirage shade was used. Wind conditions on the shooting range were continuously monitored using a Wind Probe. The set-up was very similar to that pictured below.



colt_with_pri_handguard_in_benchrest_001-1470442.jpg




The Wind Probe . . .



wind_probe_2016_01_framedb-1342522.jpg



The test vehicle for this evaluation was one of my semi-automatic precision AR-15s with a 20” stainless-steel Lothar Walther barrel. The barrel has a 223 Wylde chamber with a 1:8” twist.


lothar_walther_barrel_21_resized-1999713.jpg




lothar_barrel_crown_02_resized-1297385-1342445.jpg




lothar_walther_barrel_free_floated_05-12-1342446.jpg




Prior to firing the MEN 56 grain M193, I fired a 10-shot control group using match-grade hand-loads topped with the Sierra 52 grain MatchKing. That group had an extreme spread of 0.59”.


sierra_52_grain_matchking_10_shot_contro-1999607.jpg



Three 10-shot groups of the MEN 56 grain M193 were fired in a row with the resulting extreme spreads:


1.39”

1.35"

1.34”


for a 10-shot group average extreme spread of 1.36”. The three 10-shot groups were over-layed on each other using RSI Shooting Lab to form a 30-shot composite group. The mean radius for the 30-shot composite group was 0.47”.



The smallest 10-shot group (by mean radius) . . .


men_56_grain_m193_10_shot_group_at_100_y-1999600.jpg





The 30-shot composite group . . .


men_m193_30_shot_composite_group_001d-1999602.jpg








Chronograph data to follow

 

Molon

Sergeant of the Hide
Full Member
Minuteman
Feb 26, 2020
457
1,076
any chance of a similar look at imi 77gr?


IMI “Razor Core” 77 Grain OTM, LR, Mod 1


imi_razor_core_box_02-1985629.jpg




This load is topped with a 77 grain OTM bullet with a cannelure. The case mouth is sealed and the primers are crimped and sealed. When chronographed from the 20” Colt barrel, the load had a muzzle velocity of 2866 FPS with a standard deviation of 21 FPS.

A 10-shot group group fired off the bench from my Lothar-Walther barreled AR-15 at a distance of 100 yards had an extreme spread of 0.95”.



imi_77_grain_razor_core_measured_10_shot-1985628.jpg




...
 

mosin46

Sergeant
Minuteman
Supporter+
Aug 11, 2010
2,334
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florida 32621
thanks. happens to be my favorite. the MEN is worth a buy if available reasonable. i have their 9mm-good load.
i did look and MEN 5.56 and 9mm are OOS everywhere that i looked at.
 
Last edited:

bfoosh006

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  • Jun 13, 2007
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    As always, Thank You for sharing.

    MEN 56gr has proven to be quite accurate ( for "Ball" ammo ) out of my barrels as well.
     

    camocorvette

    Send it
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  • Apr 1, 2010
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    Their 308 with the men head stamp was some of the best shooting factory 147 fmj I ever shot. Great review as always!
     

    jLorenzo

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    Feb 20, 2017
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    Sweet. I have never seen any in the wild myself. Is this stuff rare or findable?
     

    pmclaine

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  • Nov 6, 2011
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    I think it's neat they prohibit "incompetent people" from use of their ammo in the warning.

    That would be hate speech here.
     
    Last edited:

    jLorenzo

    Sergeant
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    Feb 20, 2017
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    MEN 56 Grain M193 Accuracy



    men_m193_box_label_02-1999752.jpg




    Yes, you read that title correctly. The M193 ammunition manufactured by MEN (Metallwerk Elisenhütte GmbH) has a 56 grain bullet.

    “But Molon,” you say. “How can this be M193 if it doesn’t have a 55 grain bullet?”

    Well, if you look at the mil-spec drawing for the M193 projectile, you’ll see that the weight specification for the copper jacket of the bullet is 17.5 grains, with a tolerance of minus 1.0 grains. Also, the lead slug for the projectile has a weight specification of 38.5 grains, with a tolerance of minus 1.0 grains. Take the 17.5 grains for the jacket, add it to the 38.5 grains for the lead slug and we have a total weight for the projectile of 56 grains (with a total tolerance of minus 2.0 grains). So, as long as the bullet doesn’t weigh more than 56 grains, it technically meets the weight specification for M193.



    men_56_grain_bullet_on_scale_02-1999599.jpg




    The 56 grain MEN M193 bullet is approximately 0.030” longer than a typical American manufactured M193 bullet.



    men_56_grain_m193_bullet_comparison_01-1999601.jpg




    This ammunition is loaded in brass cases with the annealing iris still visible. The case mouth has asphalt sealant and is crimped into the cannelure of the bullet. This ammunition is charged with “ball” powder.


    men_m193_cartridge_01-1999604.jpg




    Each red square in the grid below is 1/10th of an inch.

    men_m193_powder_01-1999606.jpg




    The case-head stamp of the lot of this ammunition that I tested reads:

    5,56x45

    MEN16

    The primer pocket has a healthy dose of sealant. Strangely enough, the primer pockets are not crimped, which technically means this ammunition does not meet the US mil-spec for M193.


    men_m193_case_head_01-1999605.jpg




    Accuracy


    The US accuracy specification for M193 cited in MIL-C-9963F is as follows:

    The average of the mean radii of all targets of the sample cartridges, fired at 200 yards, shall not exceed 2.0 inches.

    These averages are from 10-shot groups fired from machine rested, bolt-actioned, heavy test barrels. All things being equal this specification equates to a mean radius of 1 inch at 100 yards (the distance at which I tested this ammunition).

    I conducted an accuracy (technically, precision) evaluation of the MEN 56 grain M193 ammunition following my usual protocol. This accuracy evaluation used statistically significant shot-group sizes and every single shot in a fired group was included in the measurements. There was absolutely no use of any Group Reduction Techniques (e.g. fliers, target movement, Butterfly Shots).

    The shooting set-up will be described in detail below. As many of the significant variables as was practicable were controlled for. Also, a control group was fired from the test-rifle used in the evaluation using match-grade, hand-loaded ammunition; in order to demonstrate the capability of the barrel. Pictures of shot-groups are posted for documentation.

    All shooting was conducted from a concrete bench-rest from a distance of 100 yards (confirmed with a laser rangefinder.) The barrel used in the evaluation was free-floated. The free-float handguards of the rifle rested in a Sinclair Windage Benchrest, while the stock of the rifle rested in a Protektor bunny-ear rear bag. Sighting was accomplished via a Leupold VARI-X III set at 25X magnification and adjusted to be parallax-free at 100 yards. A mirage shade was used. Wind conditions on the shooting range were continuously monitored using a Wind Probe. The set-up was very similar to that pictured below.



    colt_with_pri_handguard_in_benchrest_001-1470442.jpg




    The Wind Probe . . .



    wind_probe_2016_01_framedb-1342522.jpg



    The test vehicle for this evaluation was one of my semi-automatic precision AR-15s with a 20” stainless-steel Lothar Walther barrel. The barrel has a 223 Wylde chamber with a 1:8” twist.


    lothar_walther_barrel_21_resized-1999713.jpg




    lothar_barrel_crown_02_resized-1297385-1342445.jpg




    lothar_walther_barrel_free_floated_05-12-1342446.jpg




    Prior to firing the MEN 56 grain M193, I fired a 10-shot control group using match-grade hand-loads topped with the Sierra 52 grain MatchKing. That group had an extreme spread of 0.59”.


    sierra_52_grain_matchking_10_shot_contro-1999607.jpg



    Three 10-shot groups of the MEN 56 grain M193 were fired in a row with the resulting extreme spreads:


    1.39”

    1.35"

    1.34”


    for a 10-shot group average extreme spread of 1.36”. The three 10-shot groups were over-layed on each other using RSI Shooting Lab to form a 30-shot composite group. The mean radius for the 30-shot composite group was 0.47”.



    The smallest 10-shot group (by mean radius) . . .


    men_56_grain_m193_10_shot_group_at_100_y-1999600.jpg





    The 30-shot composite group . . .


    men_m193_30_shot_composite_group_001d-1999602.jpg








    Chronograph data to follow

    Any chance youve done a post like this on the Frontier 75gr match bthp?
     

    bfoosh006

    Sergeant
    Full Member
    Minuteman
  • Jun 13, 2007
    1,429
    620
    PNW
    Sweet. I have never seen any in the wild myself. Is this stuff rare or findable?
    It has been a long time since I have seen MEN 56gr for sale.

    FWIW, I have had good luck ( accuracy wise and reliability wise ) with GECO 55gr .223... the 5.56 version wasn't as accurate .. YMMV

    And the plastic stripper clips used with the GECO will work with the current Gen Maglula Striplula