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Several members here have had SSK Industries a GBO Sponsor to convert theirs. One of these days I'm gonna get one of mine converted. I bought one just for that purpose and have a ton of brass sitting ready to load.

www.sskindustries.com
 

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or if you want to have a campfire discussing piece have it converted to the 358 win.. Same deal but different rim and bullet seating depth and you'll have the only one in camp likely. same brass, same wall thickness, same volume, same pressure, but rimless. realidahorock
 

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Can the Marlin be converted to 358 win?
No sane and responsible gunsmith would rechamber to .358 Win. To chamber a gun to a round for whick factory ammo is avaiable but not safe is insanity. Unless you ignore the safety warnings regarding pointed nose bullets in tube magazines that along would preclude that chambering.
 

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explain my take on it and if ANYONE finds me missleading help me out. I'm just interested in this conversion myself and have done some research.

There are those who say that the 307 and 356 brass are thicker than the 308 and 358 brass and therefore stronger. I don't believe this and measurements have proved this to me. Off the shelf ammo has the 307, 356, and 358 all SAAMI spec'd at 52,000psi. The 308 at 62,000psi. This just tells me that there is no brass problem with this conversion. Internal volumes are the same and the 356 and 358 brass are the same length. However, the coal of the 358 is 2.76" as compared to the 356 which is about 2.5" The case length of the two are essentially the same. Long pointy bullets with good BC's make the cartridge longer.

A gunsmith would not chamber the 358 lever rifle in Marlin to fit the shelf ammo for two reasons. One, he wouldn't want a mistake to happen and let a foolish person feed pointy bullets into a tubular magazine and 2nd, a Marlin can't be made to cycle a cartridge of 2.76" with pointy bullets. I think that if a Marlin receiver is heavily modified a 2.68" coal can be cycled. But that's it as far as I have been told.

So, it's all about the logistics and not danger. 358 is rimless, a handloaders operation, and you must use flat point bullets. But it would be safe and you likely would have the only Marlin 358 in camp. Good luck and take care. realidahorock
 

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I still say it is insane to rechamber a gun to a chambering which is NOT safe with factory ammo fired in it. Pointed bullets at least in theory present a danger in a tubular magazine. Real or imagined most folks believe this is a bad practice. Since ALL factory ammo for the round uses pointed bullets the rechamber is not smart.

While I will agree that a knowledgeable reloader who reloads only flat nose bullets can do this and be safe they will not own that rifle forever. Even if they keep it until their death at some time it will fall into the hands of a person who is not aware of the need for flat nosed bullets reloaded for it. They will end up using pointed bullets in it.

I am firmly of the opinion that doing this conversion is sheer lunacy. It is eventually gonna get someone hurt. If you persist in pushing this idea on this site I'm going to start locking all your threads on this idea. I am NOT going to allow an idea to be pushed as safe that I am fully convinced is unsafe. I have a responsibilty to at least try to keep things suggest here safe to the extent I can. Or at least I feel such a responsibility.
 

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Understood! How is it that a chamber that will not accept pointed bullets purchased off the shelf present undue danger sir? Cannot one purchase 30-30 pointed bullets that WILL chamber from off the shelf. Cannot just about any caliber chamber pointy bullets when stock? A converted Marlin cannot chamber shelf purchased 358 ammo as it is just too long. there are two foolproof safteys built into this conversion. 1. standard 358 cartridges can't cycle through the chamber (too long) and 2. The gunsmith's receiver work allows only flat point bullets to chamber. anyone with any caliber lever rifle can handload a pointed bullet into thier cartridge if they are that dumb. Why do you resist this so much Graybeard? The accident you suggest about the gun transfering hands cannot happen by design. realidhorock ....... Please allow me this question and I'll leave the topic alone. I do not want to rub a sore with you Graybeard and love this very inclusive gun forum. Thanks
 

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You're real close on this one. Last post on it, understood?

You are the ONLY one of us making the assumptions it will not chamber factory .308 ammo. That is an assumption on your part I don't agree with. If a gunsmith alters the chambering he can also alter what it feeds and if he chambered it to a round that it didn't feed in factory ammo form then again I say he is doing the world an injustice. Stop thinking of only yourself and your desire to be different. Think of the next owner of it as I feel reasonably certain you will not make sure it is destroyed before your death.

END OF THIS DISCUSSION!
 

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I shall move to new topics Graybeard. If I last on this forum you will find me to be very concerned about other's and thier welfare. You are the man and have put together a wonderful web site here and I will gladly play by your rules. It is obvious to me that your concern is for others and you have a huge responsibility keeping this ship in order. Boot me off, to the moon, or into cyberspace, but not before I tell you that you have made a great place here for like minded folks to gather and share thier favorite activities. Respectfully, Life is good, realidahorock
 
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