338 Edge on Savage 112 (small shank)

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Moosetracker

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I'm thinking of purchasing a 300/338RUM (338 Edge) for my Savage 112 (300WM) which has been converted to single shot. My question is does the regular shank offer sufficient safety margin for the 300RUM case or is it preferable to start with an action that accepts the larger shank.

Also, from an ejection point of view, are there likely to be problems with the 300RUM case. I understand I can get a smaller baffle specially for the 300RUM from Sharp Shooter Supply.

Finally, who makes a prefit 300/338RUM barrel in 28" for the Savage action: Shilen, Pac-Nor, Lothar Walter?? Jerry, please can chime in.
 
I can check to see if Shilen has that reamer. So far, they have no issues putting any RUM on a small shank action.

I am pretty sure the Lazzeroni monsters were stuffed into a small shank actions too but can't verify anymore.

No one seems to know why Savage has gone to the larger shank. In fact, some are finding the barrel nuts are cracking on these larger shank actions. The exterior of the nut didn't change so they have become much thinner.

As for the smaller baffle, if you have a milling machine or lathe, just chop off the back of the lug that hits the stop (RHS as viewed from the rear), til it meets your needs. I still think that case is going to be pretty long and may hang up at the front of the receiver.

Simple test. Go seat a bullet in a RUM till it is 3.8 to 4" long. Put it beside the mag opening and see what you got.

Jerry
 
Shank on 338 RUM

I would go with bigger dia over chamber! The old formula says, that thicknes of wall over chamber should be 5/8 of dia of chamber. .338 RUM has .546" dia chamber. 5/8x.546 =.341. So shank should be .546+.341+.341=1.228". Modern steels having better quality, being hammer forged and better heattreaded should give us more safety margin. Summing up I would never go less than 1.125" on that part. chamber. My $.02 worth.
 
Savage standard thread is 1.060"X20tpi
Large thread is 1.120X20tpi.

Even the large shank would be small by your standards. yet, they exist.

A Rem 700 uses a 1.06 X 16 thread and they MAKE the RUM. I have yet to hear that Rem has a different thread for the RUM's and other large cases they offer ie 338 Lapua which is even FATTER.

But I could be wrong...

Jerry
 
30/338 Rum

I see no problem with 1.060 x16 tpi Savage threaded shank. It is supported with 1 3/8" receiver against masive internal pressure. The portion I am talking about, is the one in front of receiver. Barrel nut is not designed to help the barrel to contain internal pressure. Also, I bet, that ( 30/338 RUM ) chamber is still there in front of barrel nut! So, in my opinion, in this case, if I was doing it for myself, barrel nut would be discarded and barrel fited Remington way, with barrel dia in front of receiver at a min 1 3/16". Sorry for me, not being precise enough in the first time.
 
I tried a dummy 300/338 round with an OAL of 3.79" in my 300WM. I managed to get the extractor over the rim of the cartridge and it ejected without any problems. The ejection cut out measures 3.80" on the Savage 112. So it doesn't look like OAL is a problem.

As for large shank vs small shank, I'm still somewhat puzzled. The large shank runs at a diameter of 1.125" for a little less than 2" then drops to 1.05" or a little less. Thus the 1.125" shank is large and long enough to cover the large section of the WSM cartridges (1.702") but not the RUM cartridges (2.387"). Yet savage did produce rifles chambered in the RUM cartridges early on! Did the lawyers make them stop production?

Has anyone had any experience (good or bad) with the RUM chamberings in a Savage 110?
 
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Large shank is a reference to the diameter of the tennon only. The Savage with a SHOULDERED barrel and 1 1/8" major diameter threads at 20 tpi offers significantly more barrel steel surrounding the brass than any other rifle made. Only the actions designed for the 50 bmg allow for more material around a chamber. Even the custom actions with large tennons do not beat the shouldered Savage for meat around the chamber. The reason is the depth of cut for 20 tpi is less than the 16 tpi the custom guys use. The small shank Savage runs a 1.055" major diameter tennon and at 20 tpi is is a slight bit thicker steel at the threads than the factory Remington. Both actions are" 1.355 OD and so are most customs.

Unless your putting a whack of money into a mag system, just screw on a quality pipe and have at it. I wouldn't worry about the tennon diameter.
 
I checked with Fred Moreo, Sharp Shooter Supply and he sees no problem fitting a small shank 338-300 RUM barrel on a 112 action. The action has to be used single shot unless modified. An unfired round can be ejected as long as the OAL is less than 3.80"
 
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