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Makes one think it would be easier to just develope a regulated load for the open sights, then attach the scope and simply adjust the scope to shoot to point of aim to the right barrel and be done with it. Use open sight to your comfort range and attach the scope for a longer single shot. Isn't that what was done with drillings in Europe ?
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I guess someone has to have a different opinion, so it might as well be me. My preference if to have it regulated for the scope, since it would almost always have the scope mounted. If the expected range is too short for the scope, the difference in point of impact with each barrel using open sights wouldn't be as much as at the longer range if using the scope.
MikeComment
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I agree with Mike, but few of our members here and few gunsmithes are capable of reregulating a double rifle or double rifle driling by resoldering the barrels. I've done it several times. So I know a little bit about the problems, time and costs involved. It involves making a clamping fixture for the muzzles, new regulating wedges that go in between the barrels, lots of measuring and guessing, soft soldering, several trips back and fort from shop to range and lots of shooting. in the end , everytimes you have to reblue the barrels at least. It usually took me more than a year, as I don't have a shooting range in house. So, what to do with a rifle originally regulated for open sights? Or a rifle regulated for scope use, but has lost it's original scope and is now mounted with one of different weight?Comment
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if one can't get the two barrels to regulate with in the 3" acceptable grouping for a double rifle with a mounted scope I think I would do as I said earlier and just zero the scope to the right barrel and use it as a single shot. If one doesn't take risky shots at game , second shots are normally not required anyway. Possibly the left barrel will not be so far off that if a second follow up shot is required one can calculate the necessary hold to acheave a hit. I have three double rifles but have only begun shooting one, the 9.3 X 80 Collath . The first load I started with shot about 6" apart and 3" high with the open sights at 50 yards. I had to do some trigger work on it and the main spring broke when I reassembled it and cocked it. I just got a new main spring made and properly tempered two weeks ago so now I can get back to regulating it. I have new loads made up increasing the powder 1 grain each to see if it closes up the gap. I have also made claw mounts for this rifle and have partially mounted a period 4x German scope. So after the holidays I will be getting out to see what happens.Comment
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I forgot to mention the Collath double rifle never had a scope mounted to it so I know it was regulated for the open sights. Once I have the open sights regulated load, I am very interested in seeing what happens when I attach the scope. I have made see through claw mounts so I can still use the open sights and see what the weight of the scope does to the point of impact. I will share my findings.Comment
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Leatherman, I for one would like to see pictures of your Collath if you would care to post them along with the info. I have one in a drilling. Thanks, DizComment
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Leatherman,
If the rifle has clawmount bases, it did have a scope mounted on it at one time. They never installed clawmount bases alone.
MikeComment
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Mike you have a good point but look at the first picture and you will see that only the front claw mount base was installed when I got the rifle. We will never know why they never finished installing the rear mount. The rifle started out as a cape gun because the cartridge trap has two 16 gauge holes and two rifle holes. These barrels were probably made at a later time to fit the action. Man I wish I had the cape barrels too. I have installed a rear claw mount base myself and matched the I engraving to the front mount so it looks complete and original. And like I said I have made claw scope mounts for it too and will finish them after I shoot it with the scope attached to make final adjustments to the elevation so as to keep the cross hairs as close to center as I can get them.image.jpgComment
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Leatherman,
Now, that is a very unusual situation . You might think the rifle was captured from a gunsmith's shop, in the middle of making a set of double rifle barrels for a combination gun and finished later. I'm not comfortable with that idea because I watched a friend install claw mounts on a lot of guns, over several years. In all that time, he cut out both sections of the rib at the same time. The dovetailed plate in the front mount base would have come together with the ring, they were always bought together. Some rear bases were screw attached and/or soldered to the rib, rather than the more common method of cutting out a section of rib and soldering the base to the barrels. The rib, this far back, was usually hard soldered to the barrel bundle and better able to resist recoil forces than the forward rib, which was soft soldered. When you cut out the rib section, did it show signs of having been drilled and tapped? I still believe a scope was mounted, at one time, but can not explain what happened to the rear base under this idea. It could have come loose, or could have been removed. It is really not impossible that your opinion describes what happened, it just doesn't seem logical yo me.
MikeComment
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No sign at all that there ever was a base attached. The rib was not solid except for the last 3/8" at the breech. What I did see was rust under the rib no dought from moisture getting in there from condensation or something. I wanted the new rear base to look like it was factory done so I did not drill and tap it as most are done when done at a later time. I drilled holes in the bottom of the base and the bottom of the opening between the barrels, filled the holes and the rib with JB Weld epoxy and set the base with that. I have all the faith in the world that it will hold up. I like your idea of the rifle being liberated out of the shop in the middle of the process. I think I will go with that story!Comment
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Leatherman,
Thanks for the pictures it's a very elegant rifle and the new claw base you installed is nicely dome. Very nice work on a beautiful piece. Best of luck with it.
DizComment
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