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Don't overlook a nice older Armi San Marco! Mine from early 90's are really nice.
Don't overlook a nice older Armi San Marco! Mine from early 90's are really nice.
Arbor fit is important for accuracy. If the barrel lug touches the frame before the arbor bottoms when you drive in the wedge depending how hard it is driven the barrel if forced up. Not much, but on my `861 navy 0.011" will move the POA one inch at 25 yards.My Walkers got sloppy in the barrel/frame fit really quick, because of sloppy Arbor fitting. It is important , almost necessary, for the big horse revolvers that use 50gr charges.
The average guy can get away with a .36 Navy using the wedge to absorb the recoil for the probably 100 rounds per year he'll shoot but the big guns are less forgiving of improper arbor fit.
Amen, I have found the same things to be true in my own work and experimentation on open top revolvers! Fixing a short arbor is easy enough to do and harms nothing but is really a solution in search of a theorized problem ! I'm quite sure Pietta engineers realized this at the get go from the accuracy , longevity and safety stand point but since getting re-equipped with CNC driven machinery it made it easy to fit up the short arbors without expensive hand fitting which would have jacked up their costs before CNC implementation.
I also believe from what I have seen to this point that harmonics (particularly in open frame guns that were designed with flex in mind ) is a great theory that has no provable deficit to accuracy or strength issues. Ransom rest testing may change my thinking on this but I have to say what I believe to be true at this point in time of personal usage and discovery.
End of arbor joint compression via the wedge and slot seats creates no more resistance to barrel expulsion than if there is a gap. Harmonics plays no part in adding or detracting from strength in this instance. It is a pure (slot/ wedge) fit, tensile , ductile and compressive strength of steel issue here. All of the resistance pressure is on the key and end slot of the arbor. The end of the arbor well (which is part of and one piece with the barrel) is (at ignition) always and for ever trying to move away from the end of the arbor and drag the wedge and end of arbor slot with it.
I have never personally witnessed any Pietta reproduction. of any model , that has been proven to have blown off the barrel because of a short arbor. It has happened from arbors which were altered from factory spec.
Shhhh don't let em know ..... More for usDon't overlook a nice older Armi San Marco! Mine from early 90's are really nice.
I believe I have understanding of your thinking of all the areas discussed and am enjoying the exchange of ideas it's just a difference of opinion in some areas. You seem to think that your ideas are the last word on all subjects discussed but personal experience of my own in both shooting and working these guns over raises some points of contention. Keep an open mind your self ,perhaps you can pick up some useful ideas."Designed with flex in mind" where did you read this? Just your theory maybe?
Anyway, harmonics has nothing to do with strength but everything to do with assemblies working together rather than against each other.
So, I think you've gone as far as you can see so . . . they say "go as far as you can see and when you get there, you'll be able to see farther". As far as a " theorized problem " If you can't understand the arbor being the limiting factor as to how far the barrel can locate (rather than an imprecise "wedge placement" " combined with changing dimensions by getting hammered (referring to the harmonics thing)) then I can't or don't need to go any further. I thought I have explained it so many times and so many ways that anyone should be able to see the whole picture but I guess not. This whole discussion should at least give most a picture of what is going on with the open top design along with the "whys" and "why nots".
I do wonder what you do to make sure your wedge is exactly where it should be, what happens as any wear comes into play as far as the wedge. Since it is the limiting factor in your setup . . .
Me, my customers, and many hundreds of others don't have to worry as long as the wedge is driven in . . . the barrel is always in the correct position . . .
Mike
I found this thread very interesting, even the varied opinions in certain areas. I know we are dealing with reproductions, but what about original Colts or Remington's as far as arbor fit, timing, cylinder bore to barrel bore dimensions etc? Assuming it's a numbers matching little used original.
"LOL probably New York! The law in NY is something to the affect that if you own a BP revolver you can’t have any of the items to make it fire! No caps no balls no powder. That is why my revolvers are at my house in NH. There I can go out in my back and shoot to my heart’s content. If you want to legally shoot them in NY they need to be registered just like any other hand gun. I don’t know what the rules are for musket pistols I have seen people at the range shooting them."
I'm in NY and what a time I had getting my ROA added to my CCP (because it was BP) to keep me legal in this state hunting that has turned bad since the 70s.
Goons Gun Works A gunsmith that is well known for tuning guns. He has a good reputation for the work he does and will share his knowledge in this forum. Usually, if you start a discussion on arbor length he will appear.OK, so that begs the newbie question.....WHO IS GOON??? website? contact info?
it was the same price. i liked the look of the brass. London is just completely black. just a personal preference. both nice guns.1851 Colt London models are nice. Generally a little more pricey than a brasser I believe?
Wow that spring is significantly more substantial than the junk spring that comes in the Ubertie or piettas. Nice jobHey buddy!! The bolt block is just a fitted chunk of steel that lays along side of the bolt ( not quite like snuggling with the wifey but close .. lol). Since it has the ability to have "accidental contact" along the whole side of the bolt, it does an excellent job of limiting the horizontal movement of the bolt. It takes up the space that the force of the rotating cyl wants to push the bolt into. Therefore it stops any unwanted movement horizontally. It takes the size of the bolt window out of the equation so to speak. The rear of the block is angled so that it extends under the unused part of the bolt screw pin while the forward end is trapped under the trigger side of the re-purposed combination spring.
This can be clearly seen in this pic.
View attachment 142574
The bolt side of the re-purposed combo spring is shaped to be a keeper for the stationary end of the torsion springs.
Mike
I'm getting my Navy Brass Tomorrow via Fedex. Can't wait, however there are ZERO caps available in the world so i won't be able to shoot it until caps start making it to stores again. Super-Bummer.
I think you would do better to get a good second hand pistol and then send it to Goon.
Good grief. Sucker bait? Seriously, everyone has differing abilities. My son has masters degrees in engineering fields and I wouldn’t let him rotate the tires on the family sedan. But he’s a pretty fair rifle smith. He can build an accurate bolt gun or a replica of an SR25 that can pick the staples off a 100 yard target. Training is the difference. That and the fact that it’s so much smarter to pay someone else to rotate those tires.I've never taken to foolish spending, and found many years ago that there isn't any simple "tuning" I couldn't do to a cap and ball revolver to improve its' action. To me, spending a few hundred $ to have someone do a little twiddling is sucker bait.
There is a myriad of Youtube videos that go into various easy DIY tune-up procedures, and you can get springs a lot cheaper yourself. Careful use of a Dremel tool is what is required.
Cabelas revolvers on sale comprise most of my collection. Money saved was used for molds, tools and accessories.
So, what country is it?Well, you can't shoot anywhere outside in my county because it is too populated so that means smokeless as well as bp. Of course we have indoor ranges but they don't allow bp so it's smokeless only. So, my "favorite" revolvers have conversions in them (all .45's. I'm not into the .38 spl / barrel lining voo doo stuff).
I could drive to a neighboring county but don't have that kind of time just to shoot bp, so smokeless it is !!! Lol
Mike
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