.300 Lapua Magnum GudangMovies21 Rebahinxxi LK21

The .300 Lapua Magnum (7.62×70mm) is a rimless, bottlenecked, centerfire cartridge developed for long-range rifles. The parent case of the .300 Lapua Magnum is the .338 Lapua Magnum necked down to a smaller caliber. The .338 cartridge case was selected to withstand high chamber pressures. Combining these high pressures with smaller, lighter bullets than its parent case, .300 Lapua Magnum loadings have high muzzle velocities.




History


The Finnish ammunition manufacturer Lapua obtained a C.I.P. certification for the .300 Lapua Magnum, so it became an officially registered and sanctioned member of the Finnish 70 mm family of super magnum rifle cartridges. The .300 Lapua Magnum is no longer commercially available. It is still used by a few shooters, who produce the cases from .338 Lapua Magnum cases by reshaping the shoulder and neck, and handloading it with .30 caliber bullets.
Up to the C.I.P. decisions and tables edition 2007 the .300 Lapua Magnum was rated at 470.00 MPa (68,168 psi) Pmax piezo pressure, This very high outdated Pmax has been reduced by the C.I.P. since then to 440.00 MPa (63,817 psi) Pmax.




Cartridge dimensions


The .300 Lapua Magnum's case has a 7.34 mL (113 grains of water) capacity. The exterior shape of the case was designed for reliable case feeding and extraction in bolt-action rifles, semi-automatic and automatic firearms, including under extreme conditions.

.300 Lapua Magnum maximum C.I.P. cartridge dimensions. All sizes in millimeters (mm).
The common rifling twist rate for this cartridge is 240 mm (1 turn in 9.45 inches), with 4 grooves. The diameter of the lands is 7.62 mm; the diameter of the grooves is 7.82 mm. Land width is 4.47 mm and the primer type is large rifle magnum.
According to the C.I.P., the .300 Lapua Magnum can handle up to 440.00 MPa (63,817 psi) Pmax piezo pressure. In C.I.P. regulated countries, every rifle and cartridge combination must be proof tested at 125% of the maximum C.I.P. pressure to be certified for sale to consumers.
The high pressures involved mean that the .300 Lapua Magnum should only be chambered in rifles that are specifically designed for extremely high-powered cartridges. Chambering such powerful super magnum cartridges in rifles intended for normal magnum rifle cartridges and using Pmax loads can cause serious or fatal injury to the shooter and bystanders. A rifle that theoretically could safely be chambered for the 94.5 mm long .300 Lapua Magnum is the bolt-action SAKO TRG-42. This rifle was designed for .338 Lapua Magnum cartridges and can handle cartridges up to 95 mm in overall length.




Additional information


The .300 Lapua Magnum’s main appeal is long-range shooting. Due to the large case capacity in relation to the bore diameter (known as overbore) the .300 Lapua Magnum is harsh on barrels and typically wears them out in 1,000 to 1,500 rounds. Thorough cleaning and avoiding numerous consecutive shots help to minimize barrel wear. This makes this cartridge impractical for most competition and professional long-range shooters, such as military snipers, who tend to fire many rounds in practice to acquire and maintain expert long-range marksmanship.
The 2008 Vihtavuori reloading guide states that, when loaded with heavy .30 caliber bullets and fired out of a 690 mm (27 in) barrel, the .300 Lapua Magnum has lower muzzle energy compared to the .338 Lapua Magnum.
The belted .30-378 Weatherby Magnum cartridge, introduced in 1996, and the rebated-rim .300 Remington Ultra Magnum cartridge, introduced in 1999, are probably the closest commercially available ballistic equivalents of the .300 Lapua Magnum.




See also


List of rifle cartridges
7 mm caliber
7.62mm UKM
.338 Lapua Magnum




References



Cartridge Dimensions - Howell, Ken (1995). Designing and Forming Custom Cartridges. Precision Shooting. p. 217. ISBN 0-9643623-0-9.
.300 Lapua Magnum cartridge dimensions at Steves Pages
C.I.P. CD-ROM edition 2003
C.I.P. decisions, texts and tables (free current C.I.P. CD-ROM version download (ZIP and RAR format))




External links


Reloading data for the .300 Lapua Magnum cartridge
QuickLOAD internal ballistics predictor computer program for fire arms
VihtaVuori Reloading Guide, 2002
Lutz Möller's .300 Lapua Magnum Page with a computer made image of the cartridge - SOME LOAD SUGGESTIONS EXCEED THE C.I.P. LIMIT (4700 bar)
C.I.P. TDCC sheet 300 Lapua Mag.

Kata Kunci Pencarian:

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Daftar Isi

• 300 Lapua Magnum? | Sniper's Hide Forum
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Feb 18, 2017 · SOLD Lapua Brass 300 Norma Magnum once fired. Mg427; Mar 19, 2024; Buy - Sell - Trade Replies 1 Views 231 ...

School me about 300 Norma Magnum | Sniper's Hide Forum

Jan 25, 2018 · The Lapua really shines in a properly throated single shot rifle with COAL in the ~3.9+" range. Assuming a 230 Berger at 2950 and a 300 Berger at 2850, performance is close between the 300 Norma and 338 Lapua. The Lapua will have less wind drift at all ranges, significantly more energy at all ranges, and superior ballistics beyond 1500 yards.

.300 PRC vs .338 LM for 1500-2500 yards | Sniper's Hide Forum

Nov 23, 2019 · If so, when plugging numbers into Shooter for the .338 lapua magnum (300 otm Berger at 2750 feet/sec) and the above mentioned PRC load, Shooter tells me the PRC goes subsonic at 2150 while the Lap Mag goes subsonic at 2100...energy is 859 lbs for the Lapua while the PRC load has 651 lbs. Lapua mag goes subsonic at 2200 if muzzle velocity is ...

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Apr 12, 2001 · For 2021, Lapua offers three new cartridges for .300 Winchester Magnum. The .300 Win Mag. is known for its extreme versatility and as such it’s a great cartridge option for hunters, target shooters, military and law enforcement departments alike. Hunting cartridges with significant stopping power

338 lapua ladder test 300 gr otm berger & rl33 - Sniper's Hide

Apr 5, 2022 · I have recently started load development for a 338 LM. I am getting really close to 2900 fps with 300 gr SMK'S and 300 gr Bergers. I also have tried 285 ELD-M'S. With Lapua brass I got great results with higher velocities than I was expecting. I am using Retumbo.

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Oct 19, 2009 · I received the following from Lapua, Peterson and ADG when I inquired about 338 Norma brass. Don't know if the 300 Norma brass will be the same or not but maybe. Lapua won't be available till around April '19. Peterson version 2.0 will be available 1st qtr '19. ADG will be available hopefully sometime in '19 (would not be more specific).

338 Lapua Retumbo loads | Sniper's Hide Forum

Jul 13, 2014 · Re: 338 Lapua Retumbo loads I used a bunch of Retumbo on my Rem 700 338LM with 250 and 300 Scenars. Regarding accuracy/precision, I don't think Retumbo is any better/worse than other options. I switched to N570 for my Steyr 338LM, and am getting two results: 1) lower recoil (maybe due to the slower burn, or a better muzzle brake on the Steyr)

Need help on .338 Lapua 300 grain loads | Sniper's Hide Forum

Jun 18, 2010 · Re: Need help on .338 Lapua 300 grain loads Bob, I've shot Reloader 25 and I don't like it. I agree with Kevin on the Hodgdon Extreme (re-branded Australian import) powders. H1000 (Thales/Australian Defense Industries AR2217) is a good powder, while my personal favorite in a TRG-42 is Retumbo (ADI AR2225).

.338 Lapua or stick with my .300 win mag? Long range shooting.

Jul 28, 2022 · I have a .223 (Remington), (2) .308 AR-10’s (Armalite & Sig), a Tikka T3x Compact Tactical and a Tikka .300 win mag, along with numerous pistols. With long range shooting, I want to use “Casper”, who is my .300 win mag, but my husband is …

.338 lapua...What powder to use for 300g | Sniper's Hide Forum

Aug 14, 2012 · Re: .338 lapua...What powder to use for 300g Switched from RL-25 to RL-33 last week. Alliant's max load of 97.5 of 33 with a Berger 300 OTM ,Lapua brass,3.800 long , was 2778 in my 28 inch Obermeyer 1-9.3 gun. Went up to 98.5 at 2830.