700p 308 en 338??

salut a tous
je voudrai savoir si ce possible de modifier ma 308 en 338 lapua si oui ce quoi sa me prend pour le faire
merci d'avance

Ta 308 est une short action, tandis que la 338 est une long action...

Donc, il faut changer pas mal de chose ...Honnêtement, ça ne vaut pas la peine, tu es mieux de la vendre et d'acheter une 338LM

une fois le verrou modifié et le canon changé, y a de fortes chances qu'il y ait de gros problèmes d'éjection.
la douille est plus longue d'environ 1/4 de pouce que la fenêtre
mais meme si par tous les hasards ça devait fonctionner, ça va t'avoir couté plus cher que de vendre ta 308 et d'acheter une 338LM

l'action est pas assez solide, même une action longue rem700 normal est très limite pour du 338 Lapua.

J'ai justement une question en ce qui concerne ce type de modif pour arriver a une 338 lapua.

Je connais un gars qui viens de prendre une action de rem700 en calibre 300win mag si je me souviens bien, et a modifier le bolt face pour que celui-ci accepte du 338 lapua. Par la suite, étant donné qu'il a enlevé l'extracteur d'origine pour machiner et enlever de l'épaisseur, il a installer un extracteur a la tikka style semble a ceci:



Je trouve que c'est enlever beaucoup de matière pour un bolt pas conçu pour du lapua non.. ?

L'action 700 est pas assez solide. Même la 700P en 338lapua est pas sur une action longue normale...

Je le laisse faire.. ?

Quel est la modification fait par remington pour que l'action de 700p accepte sécuritairement le 338 lapua ?

Noodles a écrit:

l'action est pas assez solide, même une action longue rem700 normal est très limite pour du 338 Lapua.

C'est ce que je dit:

Si il faut changer; l'action longue 338LM, le canon, le pontet pour les mag détachables, la crosse ne fera certainement plus...Alors qu'est-ce qu'il te reste? Le trigger? Le trigger de Rem ne vaut pas grand chose.

Alors aussi bien vendre pour s'acheter une 338LM directement. Et tant qu'à invertir dans ce calibre, je ne prendrais pas une Rem700

alors si je veut me monter une 338 lapua ce quoi vous me conseiller
comme
canon=
l'action=
le trigger=
la cross=

merci

SAKO TRG-42 ...Déjà toute montée.

1clickdown a écrit:

SAKO TRG-42 ...Déjà toute montée.

+1.

Si ton budget est plus limité, la 700P MLR en .338.

http://www.wolverinesupplies.com/details/11684/Remington-700P-MLR-338-Lapua-Magnum.aspx

BlueBird a écrit:

Je le laisse faire.. ?

Quel est la modification fait par remington pour que l'action de 700p accepte sécuritairement le 338 lapua ?

En fait, ils ne modifient rien, ce n'est pas la meme action en 308 et en 338.

Citation :

In addition there are three lengths of action.

Short action for cartridges up to 2.800 in (71.12 mm) in overall length like the .308 Winchester cartridge family.

Standard action for cartridges up to 3.340 in (84.84 mm) in overall length like the .30-06 Springfield and .300 Winchester Magnum cartridge families.

Long action for magnum calibers exceeding 3.340 in (84.84 mm) in overall length like the .300 Remington Ultra Magnum and .375 Holland & Holland cartridge families.

Une cartouche 338 LM fait environ 3.7", et doit donc avoir une action Magnum.

Juste la douille fait 2.725", ce qui fait qu'elle entre tight fit dans une short action, et on parle de juste la douille.  En fait la 308 à 2.800" est le plus long pour une SA.

On parle vraiment pas de calibres interchangeables...

223 vs 308 vs 338
http://olegvolk.net/gallery/d/43171-1/223-308-338LM_9991.jpg

De toute facon ,le bolt face est pas le même donc ca prend un nouveau verrou. Tu peux même pas partir d'une action magnum, genre 300 Win Mag, le bolt face du .338 est .585".

Admettons que tu ferais machiner le bolt face, ca va te prendre un extracteur style Sako ou M16. Donc des frais supplémentaires.. Et je suis même pas certain qu'un bolt face magnum a assez de viande pour être ouvert à .585".

Avec un nouveau verrou, il faut faire une job de bueprinting sur l'action au complet.

Bref, ca meurt dans l'oeuf comme on dit...

Ne cherches pas midi à quatorze heures: même avec toute la bonne volonté du monde, il faut bien le dire: ton projet est un veau mort-né.   
Vends l'arme que tu as et investis sur une arme déjà conçue pour ce calibre pas trop à la portée de toutes les bourses et qui a besoin d'un champ de tir longue distance pour s'exprimer.
Ensuite, tu vas vouloir t'équiper en recharge afin de diminuer tes coûts et là encore, ça va te coûter des bidous royaux.
Et assure-toi d'avoir une presse à la hauteur: la 338 LM est un peu plus dure à reformer qu'une 223; un peu comme la .50 BMG.
PP.

merci pour vos commentaire jpense que je vais continuer di penser encore un boute

Me suis trompé, il se base sur une 7mm ultra mag, donc une action mag..

maktin a écrit:

merci pour vos commentaire jpense que je vais continuer di penser encore un boute

Pas grand chose à penser, ça marche pas.

À moins que tu veuille dire que tu va penser à acheter une nouvelle en 338...

ouin ce sa, mais mon budget me le permet pas pour linstant

Honnêtement, c'est plus le prix des munitions 338 Lapua que le prix de la carabine qui me fais peur.

Maximum  chamber pressure 65,000 psi 300 rum
max chamber pressure of 64,000psi while the 338 Lapua Mag

une pression de chambre maximum de 64 000 psipour la 300 rum tandis que le 338 Lapua Mag 60916 psi

2 site différent et 2 donné differente  ,mais il sentende  que les max pressure son plus ba en 338 lappua  qu'en 300 rum donc  logiquement laction  300 rum suporterais  les pression  de la lapua ,mais on parle de bolt  sans modif    donc  je comprend pas pourquoi il m'a pas ecouter  quand je lui est dit  fait sa en edge  dude


ceci étant dit jai trouver cette article

When you look at max chamber pressure concerning the Remington M700, its really not that simple just to reply to a simple question.

If you take a Rem 700 chambered in 223, the receiver would take pretty much anything you could put to it, well over 100,000 psi. Certainly not saying it should be loaded extremely hot but the small case head of the 223 really does not tranpose alot of chamber pressure to the bolt face.

The larger the case head size, the lower the breaking point in chamber pressure will be for any receiver.

For example and this is just an example, suppose the Rem 700 will support 120,000 psi with a 223 Rem case head diameter. Jump up to the 30-06 case head size and that would likely drop to 100,000 psi.

Step up to the belted magnum case head size and that would likely drop to 85,000 psi. Step up to the Lapua class case head and that peak would drop to say 75,000 psi.

Its all a function of chamber pressure and the amount of area that the case head presses back against the bolt with.

Now remember all these numbers are strictly for example.

Where you can get into trouble though is that many that hand load for a rifle will start with load development and increase powder charges until they top out in pressure, or at least that they think is topping out in pressure.

If you have a properly accurized receiver, you will see far fewer pressure warning signs then with a factory rifle.

If your shooting a 300 RUM for example, you will get a hair over 65,000 psi and your primer pockets will start to loosen up dramatically giving you an OBVIOUS sign that your way over pressure.

The problem with the Lapua is that by the time you reach this high pressure sign, that being primer pockets loosening, you will be WAY over the safe working design levels of the Rem 700. A 338 Lapua case made by Lapua will take 70,000 psi and show no real signs of primer pockets loosening, especially with only one or two firings. Does this mean its safe.........

A Rem 700 will certainly handle a properly loaded 338 Lapua load. That being roughly 2700-2750 fps with a 300 gr SMK in a 26-27" barrel length. In a 30" barrel you will see around 2800-2850 fps. With loads in this range, the Rem 700 is more then strong enough to handle this level of load long term.

The problem is when someone that does not have a good amount of experience loads the Lapua up higher then it should be. In that case, it WILL stress the Rem 700. Will it come loose, no it will not but over time, it can stress the receiver dramatically.

I personally will not chamber a stainless Rem 700 for a Lapua class chamber. The reason again is not that the Rem 700 will not handle a properly loaded Lapua, even the Stainless will easily handle this level, its just in the event that someone pushes things to hard and do not realize what they are doing.

With a stainless receiver, if you push things to hard, you WILL set the bolt lug supports back in the receiver, especially the bottom lug support in the Rem 700 as its not supported by alot of steel. This happens to a greater degree then the chrome moly(blued) receivers simply because chrome moly is harder and will resist set back better then stainless.

This is not opinion, I have seen it actually happen. I put together a 7mm AM for a customer right when I came out with the wildcat. I had a Rem 700 personally in this same chambering and was more then happy with it. Mine was a chrome moly receiver, the customers was a stainless.

After several months, I got a call from the customer that he was having problems opening the bolt on a fired round. Told him to bring the rifle and load data and ammo he was using.

The rifle had a 26" Lilja 1-7 barrel and was loading the 200 gr ULD RBBT to a legit 3300 fps. Now in a 30" barrel, this would be about tops, in a 26" barrel, VERY HOT LOAD.

He said the rifle performed extremely well for around 75 rounds. After that, he started to notice that the bolt was getting hard to open. Not dramatically but noticable. He backed off his load to 3250 fps but still the problem was there and was getting worse until he had dropped his load to 3000 fps and could hardly open the bolt after firing a round. Total rounds down the bore was less then 150 rounds.

First off I told him his load was way to hot, at least his 3300 fps load. 3200 fps was about right. So why was his 3000 fps load doing this????

I could not figure it out so I told him to leave the rifle and the next day I took the rifle apart. It only took a few measurement from the receiver face to the bolt lug supports to tell me what was happening. From the receiver face to the bottom bolt lug support was a full 7 thou longer then the top measurement....... When I built the rifle, this measurement was less then 0.0002" difference....

Measured the bolt lugs, they were nearly identical in length as they should have been so the bolt lugs themselves were not compressing, only the steel behind them....

So why was the bolt locking up so tightly when fired. Well, the bolt lug support surface was compressing faster away from the cam ramp so when you chambered a round, the bolt lug would climb up the cam and onto the surface but when fired, the bolt would be forced back down the declined surface, effectively making a mechanical lock.

After I saw this, I measured some of his fired case with a 0.0005" dial indicater and it was clear what was happening and this was just more proof of it.

I wanted to test this more, so I took my personal rifle which had a 27" Lilja of the same twist and loaded it up to 3300 fps with this same bullet. I shot 100 round through the rifle at this level. And I can say for a fact that not one of the primer pockets loosened up any noticable amount in the Lapua cases. Certainly not a sign that the load was safe, only that the Lapua case is brutally strong.

After those 100 rounds which were on top of nearly 400 rounds down the bore I had already fired, I pulled the barrel and made the same measurements. In this case, the measurement from the receiver face to the bottom bolt lug support was 1.5 thou longer. It to had set back but but dramatically less then the stainless receiver....

From that point on, I made it a shop policy to never built a Rem 700 stainless receiver into a Lapua class chambered rifle.

Again, please do not read this and start saying that Kirby Allen does not believe the Rem 700 is strong enough to be chambered in the 338 Lapua, that is simply not the case.

All I am saying and I will say it again to be clear, if your using standard printed 338 Lapua load data, even top end printed load data, you will be fine with a properly built Rem 700, chrome moly or stainless.

IF you load hot loads thinking you can load to the limits of the 338 Lapua case in a Rem 700, you will definatly push the Rem 700 harder then it should ever be pushed to and far past its design limits.

Keep a head on your shoulder, do not get caught up in the "grass is always greener" theory, load to standard load levels and you will be fine and very happy with a very long life of your rifle. Push things to hard and you may see just how bad things can get if a Rem 700 or any factory receiver is mistreated.

As a side note, I fully believe that a properly built and accurized Rem 700 is as strong as any factory receiver on the market including the Wby MkV and Sako TRG-S or M995. Over load any of these and you will see the same results, and they will be bad. Load the Lapua properly, and you will have nothing but great results.

Nuff ranting....

Il parle de 308 win en 338 Lapua et non pas de 300 Rum en 338 Lapua...

question pourquoi 338l ? et quoi faire avec ?

Négatos a écrit:

Honnêtement, c'est plus le prix des munitions 338 Lapua que le prix de la carabine qui me fais peur.

Exactement.. Même les composants de reload coutent une fortune..

Je comprends toujours pas le monde qui achète une 338LM et qui pourant, sont limité à 200v à leur club de tir... Ca doit être pour le 'kick' j'imagine  Useless....

Honnêtement, si tu dois compter tes cents à ce point, tu n'as pas les moyens d'en tirer.
Tirer de la 338LM à 200verges pour le trill, c'est une chose, mais aller lui foutre un o**** de muzle brake çà devient ridicule

tu revends ta .308 et tu prend pas une 700 en .338RUM ...