Vom vom 21. April bis 2. Mai werde ich in Afrika jagen

9,5 mm LM-Class Brass sport bullet in the .375" Chey Tac

LM-119

Very high BC Bullet for windy long Ranges

LM-Class LM-119 mm MSG | 67,5 mm long, 26,44 g Mass 408 Grains), BC 1,530 for 119 mm long
for .375" Chey Tac in 762 mm long Barrel | 185 mm Twist length | Bore 9,30 mm, Groove 9,53 mm

Mass [g] Density
[%]
Pressure [bar] Burn rate
[%]
V0
[m/s]
Remark
highest @ muzzle
8,00 93,40 4.587 705 100,0 844 no less
8,20 92,50 4.450 716 100,0 845 no less
9,15 99,40 4.590 847 100,0 872
9,30 103,1 4.420 918 97,53 870
8,50 98,10 4.459 759 100,0 844
9,20 97,90 4.397 869 99,44 863
Path
0 200 400 600 800 1000 1200
870 830 791 748 706 665 627
-5 +123 +194 +204 +142 X -230
0 1,4 9,6 19,1 32,7 51,0 72,9

The LM-119 replaces it's Predecessor, the .375" Viking

History | Reamer | Overall Lenght | Throat | Haack Nose | Adams Tail | Gas exhaust | Stability | Changes

History

You may want to read some the History in Kummersdorf. Then to understand the Concept behind Drive band bullets is easier. In the latter third party Measurements, intiated by Arrowtech Associates for the NDIA, shew, when pushed into the Throat, my Drive band bullets exhibited 38% less engraving Force and, rather important for the Precision shooter, the Force distribution standard deviation was more than a Magnitude smaller. The researched full metal jacketed Lead bullets just couldn`t compare. Well, this also holds for the Price. In Friendship You have to give, when You ongoing want to take.

You will see, such cheap pressed Bullets with not so slender shape and rather rounded Noses, compared to the CNC turned LM-Class very high BC Bullets for windy long Ranges cannot compare in Flight as well. Superior Design and Manufacturing yields superior Quality. Such Quality has to be made, it cannot be inspected into some lousy Junk pile, You might get from inadequate DEsign, Tooling, Machinery and Fabrication. Meanwhile, after some Years Research and Experience, Faults and Fallbacks included,  we use the best up to Date Soft- and Hardware available. I know, what we do and it's good. I know of no better Bullet than the LM-Class available on the Market for windy long Ranges. Early Predecessors, like the copper LM-105, won the Lapua Sniper Cup and still outperform other international Military Matches, where no Publicity is allowed and about I will not talk any further. Bu I know, what goes on, and it's good.

I will take any Long Range Challenge with my Bullets against Competition, provided some public an credible Control exists about the Circumstances under those such Competition shall happen.

LM-119 Pressure, contour, click to enlarge

 LM-119 900 m/s Pressure, iso, click to enlarge

 LM-119 900 m/s Velocity, contour, click to enlarge

 LM-119 900 m/s Velocity, iso, click to enlarge

 LM-119 900 m/s dynamic Pressure, click to enlarge

 LM-119 900 m/s Pressure, click to enlarge

LM-119 on the right

Reamer

Overall Length

LM-119 LM-Class Brass sport bullet in the 119 mm long .375" Chey Tac Cartridge

Throat

Haack Nose

These bullet use the 1941 Haack shape to minimize Wave drag nose. 

Adams Tail

Helped by drive band induced Micro turbulences in the middle Surface layer, the Tail uses the 1950 Adams (other Source)shape flow for the cut  Haack body to minimize back drag and reduce Surface friction (by reducing the Surface in a shorter Bullet). Adams tailed Bullets are shorter than a Viking, which helps to economize Mass production with less Rod length to procure. 

9,5 mm LM-119 + 5,6 mm LM-71

Gas exhaust

Unlike older rounder Bottoms (LM-105) or Viking shapes, the Adams tail introduces powerful Macro turbulences on the Muzzle. So the LM-Class very high BC Brass bullets for windy long Ranges need a specific Gas exhaust like the hdp Recoil brake, to control the Gas exhaust flow not to chaotic kick the flat Adams bottom and induce unwanted Yaw, leading to disperse the Hits on the Target.

Stability

With s800m/s = 1,29 the LM-119 will fly stable from 21,4 Cal. long Twist or 203 mm or 1 Turn in 8 Inches even as low as 800 m/s Muzzle velocity, meaning mild Loads. Faster is better!

Estimated Drag, BC and Gyroscopic Stability at Standard ICAO Sea Level Conditions
 -----------------------------------------------------------------------------------
  Möller LM-x Cal. 9.530 mm, 26.44 g
  Ballistic Coefficient Calculated for Drag Function G1
 -----------------------------------------------------------------------------------
      Velocity       Drag Coefficient       RPM and Stability      maximum Twist-
                      Factor of Form        at a Twistlength         lenght
                         and B.C.             of 21,3 Cal.          for s = 1.3
   Mach  m/s   fps    Cw      i    B.C.       RPM        s        Cal.   in.    mm
 -----------------------------------------------------------------------------------
  0,441  150   492  0,065  0,320  1,293      44335      0,97      18,4   6,9   176
  0,514  175   574  0,064  0,318  1,301      51724      0,96      18,3   6,9   175
  0,588  200   656  0,063  0,313  1,323      59113      0,94      18,1   6,8   173
  0,661  225   738  0,062  0,301  1,378      66502      0,91      17,9   6,7   170
  0,735  250   820  0,062  0,277  1,496      73892      0,87      17,4   6,5   166
  0,808  275   902  0,062  0,242  1,711      81281      0,80      16,7   6,3   160
  0,882  300   984  0,065  0,205  2,015      88670      0,69      15,5   5,8   147
  0,955  325  1066  0,094  0,229  1,810      96059      0,44      12,5   4,7   119
  1,000  340  1116  0,196  0,413  1,002     100580      0,51      13,3   5,0   127
  1,102  375  1230  0,185  0,318  1,300     110837      0,60      14,5   5,4   138
  1,175  400  1312  0,221  0,356  1,165     118227      0,70      15,7   5,9   149
  1,763  600  1969  0,193  0,312  1,327     177340      1,13      19,9   7,5   189
  2,351  800  2625  0,161  0,296  1,400     236453      1,29      21,2   8,0   202
  2,939 1000  3281  0,137  0,271  1,530     295566      1,38      21,9   8,2   209
  3,526 1200  3937  0,119  0,240  1,726     354680      1,43      22,3   8,4   213
  4,114 1400  4593  0,105  0,212  1,949     413793      1,47      22,7   8,5   216
  4,702 1600  5249  0,093  0,190  2,182     472906      1,50      22,9   8,6   218
  5,290 1800  5906  0,084  0,171  2,421     532020      1,53      23,1   8,7   220
 -----------------------------------------------------------------------------------

Lutz Moeller, 24th February 2008

Mild Frost, Sunshine, no Snow after Lunch this Day at Midday

 

LM-119 and .375" Viking Changes

Lutz,

the rifle I am having built is designed to shoot the Viking, the bore is Barney Lawton standard bore and groove. Evidently you can't produce the Viking in a timely manner and the LM-119 requires a different bore and groove. According to the info on your website the LM-119 also needs a special muzzle brake.

LM: Read Gas exhaust! Make no Mistake. Every Bullet benefits from a well designed Gas exhaust - that a good Muzzle brake is, the Shooter as well, as long as he wears Ear protection.

I think if these issues can't be resolved.

LM:  They are already. Read further below.

I would rather abandon the project and build a 1:11.5" twist. There are several different projectiles readily available and more economical to shoot.

Mittwoch, 14. Mai 2008 04:20

Terry,

Noel Carlson talked me into several Changes to my Projectiles for the Barrels he intended to make. After he never bought any Bullet from me and never delivered any Barrel to me, but only used my Time, I canceled this kind of "Cooperation". He may independently pursue, what he likes and so do I. Good Luck Noel, may Your Dreams come true!

Unfortunately I did not change the Data on the LM-119 web page, after I returned to normal, that is the PCT-6883 Reamer and  .375" standard Dimensions, Bore 9,30 mm, Groove 9,53 mm. Shame on me. I did so technically, but not in my Web appearance. To say it loud an clear in simple Terms: The .375" Viking and the LM-119 will shoot from the same Barrels.

Cape buffalo Syncereus caffer

The Vikings will ship to me next Friday, while I am away in Africa hunting the mighty Cape buffalo. I shall, if they let me,  return end May and will then ship Your Order. As You mentioned above, with Barney Lawton You are still in the Position to change the Twist of Your Barrel, so I must say I find You Expression "Evidently you can't produce the Viking in a timely manner" inadequate. We both sail her to new Lands and that takes Time. I agree, I encountered a Mistakes in Manufacturing, as the LM-119 Successor appeared before its Predecessor .375" Viking. Still I am faster than You or Barney Lawton. Next Time You ask for timed Delivery, do that before You order, not after.

Regards Lutz

1'000 - 2'000 m

Hi Lutz, Thanks’ for your swift answer!

It was nice to hear that you to enjoy our beautiful country (nature and hunting wise) and hope you´ll let me know in time when you intend to go back. If the timing fits I could arrange some hunting on driven game (wild boar, roe and moose) or some duck shooting!

LM: Dear Dan. I usually travel twice a Year to Svante and Friends in or near Sunhultsbrunn. While Stockholm lies further north, it's a rather nice City indeed, specially for a Sailor from Hamburg, a Town on the Water like Stockholm 

I completely agree with your thoughts when it comes to hunting, so let’s drop that question and focus in building a .408 adjusted for the use of your bullets with the purpose to shoot 1'000 - 2'000m, without any consideration of the budget. I do like the .408"´s ability to maintain energy over the longer distance (I guess a cartridge with your bullet is up to the same performance as the standard round) and please feel free to correct me, if you are of a different opinion! Used to the .416 Rigby and the .470 NE, I don´t feel uncomfortable with the recoil issue and besides, intend to apply a suppressor which is now is allowed in Sweden but subject to a separate license.

Yesterday I spoke to a very helpful gunmaker in GB, Peter Walker at Walker Rifles and he suggest the use of a BAT action and to await their new production of cut barrels. He agreed on the fouling matter and requested barrel length and twist info for the use of your bullets. Furthermore he would use a McMillan A-5 and a Jewel trigger. I will follow your advice and also speak to Martin Baisotti at Armeria Camuna.

When it comes to optics I´m a fan of Zeiss and have seriously battered their sights throughout my life and hope they make a variable sight ( somewhere in the 5-25 range) and a reticule appropriate for the mission. With my limited experience of other makes in mind, I still firmly believe it´s hard to beat their glass and clarity.

I´m aware of the cost associated with having somebody to load, but I simply don’t have neither the skills or the time to achieve them so I would have to find a reliable person with the right attitude when it comes to quality.

Again, I express my gratitude for your help! It´s been some months without luck.

Kind regards, Dan Walker, Freitag, der 13. Februar 2009

Dan,

You are Walker and would like to cooperate with another Walker in Yorkshire. Is that a Familiy affair?

Why not a Yorkshire Gunsmith, a BAT Action and a Zeiss Glass, but consider this. That all are not the determining Points. The Performance determining Point is the Bullet an consecutively the Cartridge and Barrel to propel it and launch it from. Anyone can shoot a Kilometer with the .338" LM from a Production Rifle, like the Sako TRG-42.

If You want to do better, reach longer, drift less in Wind, You screw a Replacement barrel for the LM-105. If You like, use the Gewehr-06. In a Kilometer the LM-105 cuts Wind drift, compared to Lapua Factory ammunition, almost in half (~ 90 cm against 1,67 m @ 4 m Cross wind, if I recall the Number of my Head right.

When like to reach even further the Wind drift becomes Paramount, the one Factor to minimize. Given You want a Rifle You can carry and handle, Weight and Length set limits. We talk no Cannon on Wheels here. Regarding Components, the .408 Case is to be considered, but to big bored. That Cartridge in 9,5 mm is a good Solution to propel the LM-119 with available Powders form a Barrel with reasonable length. So there it is, Your Solution. Read about the LM-Class Bullets and the LM-119 and Discuss it with Your Gunsmith of Choice, Walker Rifles or any other, You trust, and then com back.

Have nice Weekend, Regards Lutz


The Cartridge to shoot far

Hello again,

Sailor! Commercial or recreational?

LM: Recreational only!

What I understand from your mail, you advise me to not go for the .408 and if I did it would not be possible to use the LM-class bullets?

Thanks again!

Dan W., Freitag, 13. Februar 2009 17:34

Dan,

use the .375" Chey Tac with the LM-119 Bullet. The .408" CT qualifies not for a LM-Class Bullet and the regular is inferior to the .338 LM with a LM-105. So there is no sense or need to consider the .408" CT for serious Long range shooting. As You said, what You want, this is now, what You get.

Lutz

Käskopf trifft Fischkopf

Dear Mr. Moeller,

For some years I have been following your site and the many detailed tests on solid bullets. I am very impressed with the work you are doing and am amazed what you have done so far.

LM: Thank You. Stay tuned!

I myself shoot mainly f-class in the UK, often along with your fellow countrymen. Recently I have started a new project based on the .375 SnipeTac case and am now looking for available bullets.

Picture Source

Your LM-119 is very fascinating with the excentric tail design.

LM: Not "excentric", but minimum Drag!

May I carefully ask you if you also sell these bullets?

LM: They are available, but carefull notice their Launch requirments!

Hopefully you will continue to fascinate your many readers and maybe we will meet each other on the range. It is a small world after all.

LM: Yes ist is a, and this may well be on Day. I always enjoy such Events and the social Talk around it.

Thank you for your efforts and information that you are sharing.

LM: You are wellcome, and  - doing, what Yoy do, - You probably will turn into a Contributor! 

Mit freundlichen Gruß, Jim de Kort, Käsekopfe ;) Mittwoch, 11. Mai 2011 22:45

LM: Käskopf now is Fun! I am Fischkopf!

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