Lutz Möller .300" Lapua Munition

.300" Lapua Magnum in Iceland

Hi Lutz Möller,

my name is Jakob Gudjonsson and i write to you from Iceland. I just had a .300" LM made in the U.S.A. and I'm interested in you know any load data for it. I had it made to shoot the 15,5 g 240 gr Sierra HPBT bullet. I'm also interested in the bullets you are using in .308" W. and .338" LM. Can you send me some more info on that price and stuff.

Thanks Jakob H. Gudjonsson, Samstag, 27. Oktober 2007 15:45

Hallo Jakob,

not before You tell me the Twist angle or Twist length together with Barrel length.

Regards, Lutz,

.300" LM Rifle

Signature

Hi Lutz,

I don't know the twist angle, but the twist length is 1 in 10 Inches for my 300" LM barrel (.342 nk) and 1 in 9.4 Inches for my .338" LM barrel (.370), both are 27" long and then the brake. The barrels are from Mike Rock of Rock creek barrels. But if you want any more info, I can get that from Mike.

Thanks Jakob, Samstag, 27. Oktober 2007 17:20

Hallo Jakob,

if the Gun is meant to hunt, look above . You find the suitable 7,62 mm KWJG 7624 there. Or do You pursue other Interests?

Regards Lutz

New Zealand

Hello Mr Moeller,

I would like to send you a short request about your bullets from New Zealand. I am really looking forward to my next rifle project which is going to be a custom .300 magnum. My decision is still due concerning what .300 mag it shall be. Object of desire is either a .300 Win Mag, a .300 Weatherby Mag, a .300 RUM or a .300 Lapua Magnum, which I saw on your site (I do understand a limited amount of german).

The bullets I saw were mainly the normal 7,62 mm KJG-S which seem to be about 8 grams and feature this black plastic tip. The other ones were the 7,62 mm KWJG 7624 custom bullet for the .300 Lapua with standard 254 mm Twist length that weighs 10,2 grams and a .308 KSG which seems to be a target shooting bullet.

LM: Yes. The .308 KSG is a Custom special Bullet for the .308 Win Cartridge with 12 Inch Twist for 500 m, so northing You would want.

Now, I need the rifle for longer distance target shooting (as a kind of training for hunting) and long range hunting in the USA and some other places around the world on chamois, red deer and ibex's as well as some varmints. The distances are going to be limited to about 800 meters (I know what I am doing, so do not worry). What I am interested in is down to what velocity your KJG bullets will "blow up" in the intended way?

LM: 650 to 700 m/s

From some German friends who are reading your site with all their heart, I found out, that the lower end of this velocity will be around the 700 m/s mark, is that right?

LM: Yes, about!

The barrel on my rifle will be a Shilen 1:10 inch twist. If you have a better idea, please let me know, I appreciate every form of advise and help.

LM: Nothing wrong with Shilen, but for longer Range You would want a longer Bullet, that in turn required a longer Twist. If You would like to stretch the Possibilities to the Maximum, You like 9° steep Twist angle, that is 155 mm Twist length, cut as an exponential Gain twist, starting after Peak pressure location. Not many Factories can do that. Pleas ask Shilen, whether they will do that for You. Else Ask Noel Carlson (Contact Details off line).

In case you suggest another barrel twist, can you calculate a heavier bullet than the 10,2 grams bullet for the Lapua Magnum?

LM: Yes I will. But that may take some Time.

And can you please give me some advise on the "max effectice range" of your bullets out of the cartridges above?

LM: Oh, that's very simple. If You want 800 m effective Range, I design them to perform on that Range I have a Trick bag to accomplish that anyway. I will probably ask You for a 900 mm Barrel length, though. Would You cooperate here, or is that too long?

I am going to be using heavy loads, so please do those calculations on pretty fast loads (like the 1.200 m/s one for the .300 RUM).

LM: Before I start, You first must decide, whether the Optimization goal shall be a flat Trajectory or low Wind drift.You cannot have both.

Thank you very much for your time.

LM: Welcome.

It could take some time for me to get back to you after a possible reply from your side, because I am using a friends email address.

Andrew Warrington, Montag, 28. Januar 2008 10:07

Long reaching Plans

Hello Mr Moeller,

and thank you very much for your fast reply.

I was actually thinking about getting a gain twist barrel. The "Weltrekordgewehr" which was used to win the 7^th Lapua Sniper Cup had one as well, I think.

LM: Yes, but the winning Rifle was a SAKO TRG-42 with a same Barrel.

My research on that topic let me find that Lothar Walther (correct spelling?) (LM: Yes) does gain twist barrels.

LM: Yes, but not really on a 1 Piece bases.

To get a picture of what I am planning, you will probably need some information. I am going to build the rifle on a Sako TRG action.

LM: Very good! a proven performer!

The rifle will wear a Schmidt &; Bender PMII 5-25x56 with the cm clicks, that will give me at least 250 cm at 100 meters.

LM: A good Concern! With many Cartridges Elevation is a Problem.

The barrel is still matter of discussion. The stock will be the standard green Sako TRG stock, because I have good experience with it. A 90 cm barrel would be really long, but that rifle is not going to be a stalking rifle, so it won't matter too much.

LM: Thanks for the Accord.

Men at Work . . .

. . . get the Cup!

The winning Rifle in Front - 90 cm Barrel - LM-105

The cartridge is probably going to be a .300 Lapua magnum, as the cases seem to be the best for my applications.

LM: Agreed.

You asked me, if I need a focus on wind drift or in flat trajectory. Well, I have a rangefinder, so the trajectory will not matter too much, because with tables, I just click the range into the scope and we're in business.

LM: Yes, no other Way is possible.

And your bullets seem to fly very flat anyway. So can you try to calculate a 7,62 mm bullet, that is made for the 155 m twist and give me a table out to 800 meters in 100 meter steps, that shows all the important information? Altitude at 500 m would be fine. I hope, you can cope with that. But your bullets seem to be really interesting, as they do generally have high BC's and therefore low wind drift.

Just a last question: As I have still not decided on the cartridge question, I would like to ask, if you can re-design the LM-101 or the "Taras" bullet into a hunting bullet, as that would be less work for you. In that case I would be using a 8x68S or a 8x70 Lapua Magnum. If that is possible, please just give me the above tables on those bullets out of those cartridges and do not start calculating the .308 bullet.

Cheers, Andrew Warrington, Montag, 28. Januar 2008 22:55

Andrew,

I knew, this "Best bullet Question - don't care the Cartridge" would come one of these Days anyway. You could not ask for much more Work. As You are hunter, this appeals to me. So at least You would like to kill something out there. I like that. I have lot to do these Days and will not be able to start right away. To be sure, I do not forget the Task, You may remind me weekly.