Finally, a real gunsmith issue; I'm tired of all the pontificating on the merits of Mauser actions, or lack thereof.
Now, I don't know how many of you have Dumoulin actions that were sold a few years ago but if you do, you know that the scope mounts are hard to get, and/or/very expensive. They have integral dovetails, and are also drilled and tapped. Which works but looks funny.
The front DT is 16.5mm and the rear is 14.5. Tikka rings will work for the front, and I have shimmed them for the rear. Solder a shim on the left side; the right will tighten up the remaining 1mm.
But a better way is to put Talley rings on. Simply mill both dovetails to the same width, 12.5mm, and that's it. You can either drill for the little recoil stop pin, or just let the ring butt against the front DT which is not cut all the way through.
Oh, the Dumoulin is just a 98 Mauser. Probably not strong enough for anything more than a 300 Savage.

I've got a Dumoulin action and a set of Sunnyhill rings, back ring thats a tick to wide. I figured to have a dovetail cutter ran down the clamp side of the ring, I didn't think about a shim.

My back ring also has a recoil lug, figured either remove it or drill the back to fit the lug.

I'm not so sure it wouldn't look better with the dovetails ground and use standard Talley bases and rings.

With that said, the only one I've held is the one I have/bought at the Tulsa gun show 15 years back or longer. Most of the pics posted of Dumoulin actions have the Sunnyhill and they look ok, but I'm thinking about a 30mm tube scope. Not sure what I'm going to do just yet. When I bought this action I though it was the coolest thing since sliced bread. Once I got it out and started fooling with it. Its a little odd.

quote:

the Dumoulin is just a 98 Mauser. Probably not strong enough for anything more than a 300 Savage.

we all enjoy a bit of good humor.....but are you in jest here? I haven't worked on mine yet but thought it would make a fine .338-06!

Sunny hill rings are exorbitantly priced for me. Which is why I developed a better way. Milling DTs is child's play.
No need for the recoil pin on both rings.
You could certainly remove the dovetails and use regular mounts, but I would not do that. It is easy to make the dovetails work as I said above.
I am referring to that other thread that says all Mausers are prone to disintegration at any time, or they are strong enough for a 50 BMG.
Don't blame you for not reading all that.
For those who don't do humor, the Doumolin actions are suitable for any cartridge you can fit into them.

dcpd,

I got my Sunnyhill rings from Matt here on the site at a decent price, pretty sure they are Sunnyhill. I doubt Sunnyhill will ever make a set again. I'm not a fan of 1 inch rings and like Talley rigns, but dang if these Sunnyhill aren't nice looking. Not sure what Sunnyhill is doing now days. I think you can special order custom items through Brownells, but not sure what.

I kinda figured the back ring wouldn't fit, thought I had read something about they/had to be worked. So I knew what I was getting into.

One thing about the Sunnyhill rings I didnt know. The recoil lung looks to be pressed in best I can tell, looks like it can be removed pretty easy with a punch. I agree the lug is not needed.

I've always wondered why the odd dovetail configuration on this Dumoulin actions.

Actually the first one I am doing is with original Kimber rings. The Doumolin is set up with odd DT sizes because they were stupid.
You don't like one inch scopes?

quote:

Originally posted by vapodog:

quote:

the Dumoulin is just a 98 Mauser. Probably not strong enough for anything more than a 300 Savage.

we all enjoy a bit of good humor.....but are you in jest here? I haven't worked on mine yet but thought it would make a fine .338-06!

Vapo, I think DPCD is having a little fun referring to the 3 pages of discussions on how strong or weak a Mauser would be depending on if you grind various versions of the large ring to small ring dimensions.

Amd how about cutting the new dovetail in the front and rear rings to fit the Talleys?

quote:

Originally posted by Jim Kobe:
Amd how about cutting the new dovetail in the front and rear rings to fit the Talleys?

Thats probably what I should have done, but this is my first experience with a Dumoulin action. I'm kind of learning as I go with this thing. When I bought this thing years ago for whatever reason I though it had 19 MM dovetails like a 550 CZ or whatever size a 550 is.

Thanks Billy

I have three actions; for myself, for once. The first one will get the Kimber rings. Second one, Talleys. I have some Tikka rings that I might use too. As I said, milling the DTs narrower is easy.

What i meant was that I had considered doing one that way and then thought better of it, I didn't think cutting into the front ring would have been prudent, too thin at the base of the dovetail.

quote:

Originally posted by Jim Kobe:
What i meant was that I had considered doing one that way and then thought better of it, I didn't think cutting into the front ring would have been prudent, too thin at the base of the dovetail.

Well now you have done it.

This thread was supposed to be an escape from the other structurally weakening a receiver ring thread.

When I read that I yelled; Son of a B*tch!!! They have infiltrated this thread with the same comments from the other completely out of control one.
How about this; and I have said it before; DO not read, or even think about doing, anything I post. Everything I do, write, or even think, is not for your use. Just because it works for me, does not mean it will for you.
(BTW the Doumolin ring is definitely not too thin).

Tom,
Forum member TC1 has used these before if I recall some of his postings. Perhaps he can be of assistance?

I don't need any assistance; thanks. This post was just to tell what I was doing.
I have everything well under control.

quote:

Originally posted by dpcd:
I don't need any assistance; thanks. This post was just to tell what I was doing.
I have everything well under control.

Clearly, you have weakened every piece of steel you've ever touched.....and need the advice of rank, amateur, dillitant hobbiests like myself. (SARCASM INTENDED)

I sold a bunch of Dumoulin actions a few years ago. I noticed that standard Talley Mauser bases had the correct hole spacing but the rear one was too tall. I had Talley mill off the rear one to the height of the front one on several sets. Now Talley sells the same Dumoulin bases as a standard catalog item.

Milling them for talleys is the way to go!

Doug you are absolutely right!
I do not want bases sitting on top of dovetails; hence the reason I ignore the holes in the tops. That looks funny and amateur. It would be easy to make any type of base, flat, and screw them on. I might do that and mill out the dovetails so it would look like a platform instead.