JohnH, going from 30-30 to 356 win. is just a simple barrel change. The hard part is finding a barrel, a factory barrel might be almost impossible to find. your best bet if you want a marlin in 356 is to buy a 336ER in 356.some one here has one for sale I think. I think brand W's are a little easier to find if you want to go that way. The 35 can be pumped up quiet a bit and will do just about anything a 356 can with the right ammo. HYDE
If you decide to convert your 336/30-30 to 356 Win......make SURE your gunsmith breeches the rifle to obtain the absolute tightest lockup possible. The ability to shoot factory loads with safety depends greatly on the lockup. Pressures run 10-12000 psi higher for the 356!
Tomray is right , this is not a good project for a first time home gunsmith.make sure your gunsmith knows what he is doing. Some here might not agree, but I've always thought the 356 is right on the edge of being to much for the 336. be careful. HYDE
Hi sure shot.Hows she going.Hows the 35/444 workin out.One question.Are the barrel theads on the 35 barrel the same as on the 444 reciever.Also did you have any trouble running the 444 reamer through the chamber on the 35.I was on the www. fireing line .com site and they are a lot of people there with question for you about this easy convertion.Seems like there are a lot of interest in marlins in 356 and 358 cal and there hard to find.I think maybe you are on the right track with this one.I dont know why marlin dont do this, would be easy for them and nearly no tooling and they would be right in there with winny and browning for sales on 358 caliber lever guns.Go figure.hawkin.
I found this one in the cartridges of the world book and when I asked about it everyone agreed it was right in the catagory. I Just picked up the 35 rem barrel I had at the smiths for blueing, still not done but figured I would try it, see how it works and then consider a better barrel as this one is 20" and I would like to have it in at least 24".
Sure-Shot, is the 35/444 the same as a 358 JDJ ? I've been thinking about the 358 or 375 JDJ on a 444 receiver for awhile . The 35 barrels are alot easier to find then the 375 barrels. What about having one of the 24inch 30-30 or 32 win. barrels from www.gunpartscorp.com rebored. HYDE
Could be done and the JDJ cartridge is one that appears to compare. Right now I am trying to complete two projects, converting a MR7 in 25-06 to a 35 Whelen and the 35-444 is the other. I got sidetracked a bit when I bought a 336ER in 356 and am trying to move forward. The 32 barrel may be a very good Idea, thank you, have also considered sleeving a 444 barrel and not having to worry about threading as it is off the same rifle.
Sure shot.Is the threads on the 35 barrel the same as on the 444 reciever.And is the 444 rifle based on the 1895 reciever or is the 444 on its own receiver.A fellow on the fireing line.com said the the receiver is .02 th to short and wont cycle the 35/444.But you have ream the 35 chamber out anyways so get a throater reamer and lengthen the lead a touch longer..Also with a 336A barrel with 2/3 mag wilol th mag match and the hole at the end of the mag for the screw match up.Also those 336A barres came in 24" as I have own one in 35 rem.Your thoghts please. Hawkin.
If memory serves, the .307, .356 and .375 are much higher pressure cartirdges than the .30-30 and .35 Remington and required a special heat treated bolt in the 336 to handle the pressure. I consulted a gunsmith about just such a conversion and he cautioned me against it.
I rebarreled a 336 with a .375 Marlin microgrove barrel and reamed it out to .38-55. I shoot a 255 gr. bullet at 1700 fps. This is a much better load than the .30-30 for deer and black bear.
All 336 receivers are heat treated the same. This myth of different heat treatments has floated around several years. I believe that following a company lawyers advise all advertised pressures are kept low to prevent someone from trying to go after them because they exceeded the listed pressure max. Same reason they added the 450 so they didn't have someone putting a max load in a 100+ year old 45-70 and getting hurt. I have been unable to find any authoritive report, test, destruction test, to support the 336 having different heat treatments. If you know of any please advise as I can't find it anywhere.
In the last year I've built a .356 and a 375 on 30-30 receivers using factory barrels . Both shoot great with no sign of pressure problems. You do need to hold to min. headspace but that is easy to do in a 336. I've never had to try but I understand the carrier can be modified for a longer cartridge. I think WWG does this on the .457 they have. The threads are the same on every barrel I've seen (30-30, 35, 356, 375, 45-70) . 1895 and 444 receivers are basically just 336 receivers with a modified ejection port. HYDE