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Discussion Starter · #1 ·
Who has done this one on a marlin? What did it take besides MONEY? I understand winchester produced some but I'm a marlin man. Any body know a cheap way for this one? Good hunting, Rick
 

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If you decide to rebarrel a 30-30 to 7-30 Waters you wont regret it. I own a Win 94AE carbine in 7-30 Waters. The gun shoots like a dream. Capable of shoots out to 300 yards. 38 grains of XMR 4064 behind a Nosler 120 gr. BTFP will get me just over 2725 fps.

Wish I had the funds to rebarrel a Marlin to a 7-30 Waters. That way I could have one for me and one for my son. Some day maybe.

7-30 Waters
 
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7-30 Waters,

I have a 336cs 30/30 that I would love to rebarrel to the 7-30 also. How long is the barrel on your Winchester? I remember reading a Ken Waters article about the 7-30 and he was sad that Winchester had cut the barrel length down to 20", I think, from the 22" or 24" that first came out. He seemed to think that with a 7mm bullet the extra inches made a difference. I don't even know if anyone makes a 7-30 barrel for the Marlin. BM

Bill
 

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BlueMoon: My barrel length is 20". The 4" loss in barrel length has no major affect on velocities. My favorite load for my Waters is 38 grains of XMR 4064 behind a Nosler 120 gr. BTFP. I get an average velocity of 2725 fps. Low extreme spreads and ex cellent accuracy.

Ken Waters goal was to achieve 2700 fps with a 120 grain bullet in a 24" barrel. It can be done safely in a 20" barrel. This load is straight out of Accurate Arms manual #2.

Sadly enough, Hornady discontinued their 139 gr. FP. I bou ght five boxes before they all dissappeared. I get 2500 fps with this bullet. Not bad for a carbine. XMR 4064 is slow enough burning that I have had no high pressure signs yet.

I also recently tried the new Speer 130 gr. FP. Shoots real well also.

A s for a barrel I am sure there is a good gunsmith out there who can rebarrel your rifle. The barrel doesn't have to be from Marlin. Could be a Shileen barrel or Douglas.

I would contact SSK industries and see if they could help you out. I know they do alot of this kind of work.

Good luck,

7-30 Waters
 

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I thought of doing this to my 336W and contacted SSK. JD said it could be done, but wouldn't be cheap. Around $700 was the quote.......better to buy another rifle IMO.
 

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7-30 Waters

I am really intersted in this conversion, I have had a 30-30 for years, done real well, but have a desire for a slightly flatter shooting rifle, something different from my 45-70.

Does anyone know someone who has done this conversion with a model 336, for a fact?

Any other sugesstions other than SSK?

Thanks

Chuck
 

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Here are some sites with info on 7-30 Waters or 7-30 Waters Imp.
http://www.chuckhawks.com/7-30Waters_Imp.htm improved version
http://www.hodgdon.com/data/rifle/730water.htm loads
http://www.reloadingroom.com/page29.html you will enjoy this one
http://www.reloadbench.com/cartridges/730w.html
http://www.owlnet.com/quality/7-30 Waters.htm components
http://www.chuckhawks.com/7-30waters.htm have to register to read these
http://www.thegunman.com/pistol/p10.htm maximum load data (Handgun)
http://handgunhunt.com/feature/s14/ Article on TC Contender in 7-30
http://www.gamaliel.com/cart/catalog/product_222_Federal_Premium_730_Waters_120_gr.html loaded 7-30 ammo
http://www.sportsmansguide.com/resource/federal_charts/7-30Waters.html specs on load
http://www.accuratereloading.com/ubbthreads/showflat.php?Cat=&Number=513983&Main=513983 discussion on fireforming 30-30 to 7-30 waters

I am trying to find specific info on Barrels that will fit the Marlin 336 will report back on what I can find. You have me interested, think I will be doing one as well.
 
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Happened to be looking back and saw this . Any of you gents gone through with a conversion yet ? Personally ,I would like to find a 336A or 336SC that was made after the factory started drilling and tapping these (after 1955 I believe). The rifle would have to be 30-30 of course. Then take the rifle apart screw on a new twenty inch pipe and I will have a 336SC in 7-30 Waters. And if the gun shoots to suit me ...better wood may be down the road :D :!: Noslers 120gr FP is still made, Speer I was told is making a 130gr FP and Hornady quit making the 139gr FP. But I have a few sources for those. Figure if I stockpile 5 to 10 boxes that should last me the rest of my life. And also Saeco and Lyman make molds that should work alright in a tubuler magazine :D Would like to hear thoughts on this project . Also intrested in 7MMSTE (307 case necked down to 7mm) :!:
 

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6pt-sika



The 7-30 while an interesting round, basically loses out when using heavier bullets. Pretty much limited to the 130 grain or less. If you wanted to go to the wildcat version I would consider the larger bore 30-30AI and 125 or 130 grain bullets. You will definately get good ballistice and way less to do as far as a firearm is concerned. What you would save rebarreling to 7mm would definately cover the cost of the AI conversion and the dies. Just a thought. If you are set on a 7-30 it is a good cal and would make a nice addition to any marlin owner.
 
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Part of my reason for wanting one is the fact that I have dies ,bullets and about 250 pieces of brass on hand already. I've had two or three Contenders over the years in that caliber :!: I've looked at the 30-30AI rather long and hard. And have contemplated that as well, but I can't seem to get into the AI as much as the Waters. I think if I can find a post 55 SC or A , its a done deal :D :!:
 
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What I have read about the 7-30 Waters is that most of the flat-nosed bullets for it are no longer made. Does anyone know if there is a suitable jkt bullet made that would work in a tube magazine? I know some of the cast bullets might work that are rounded but I haven't seen any 7mm moulds that feature a flat point. I would still love to have a 7-30 but the same bullet that works in a contender won't work in a 336's magazine. BM

Bill
 
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Sure Nosler makes a 120FN and supposedly Speer is making a 130gr FN. Also if you look around you can find 139gr Hornady FN bullets. There are two easily available bullet molds you can purchase Lyman makes a RN and Saeco makes a FN. Bullets are not the issue :!:
 

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Discussion Starter · #20 ·
I haven't forgotten the idea of this conversion but I'm going to do a 307 first. Had to sell off a couple of guns due to getting laid up. I played with some of Pacos loads in 30-30 instead. I worked the speer 130 grain fp up to 2726 fps with 34 grains of H322 pushing it. Max in the manual is 33 grains at 38,000 cup. I've backed the next loads back down to 33 because the accuracy was a little better. That's out of a 20 inch barrel. Haven't had time to get nit picky with it yet. Best load may be in between. Rick
 
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