577-450 Chamber Adapter to shoot 45 Long Colt, which dealer had them?
- Thread starter Jay
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NorthCoastBigBore
CGN frequent flyer
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- Northwest BC (Rural) 103-I-##
There is an ad in the EE for these, from one of the supporting dealers
You'll find it under "exchange of Parts etc... for Blackpowder & antiques"
Good luck
Edit: Del Selins: http://www.canadiangunnutz.com/forum/showthread.php/920062-577-450-to-45-Colt-Adapters
You'll find it under "exchange of Parts etc... for Blackpowder & antiques"
Good luck
Edit: Del Selins: http://www.canadiangunnutz.com/forum/showthread.php/920062-577-450-to-45-Colt-Adapters
I think there is an inherent flaw in shooting 45 colt shells in a 450 - 577 barrel --- the groove diameter of the barrel is up around 460 and I think the bore is .450 while the colt slug is only .451. You might want to try using hollow based soft 455 Webley slugs in your 45 colt shells, in the hope that they will obturate and fit the rifling. The pistol shells do have the advantage that the liner is thick enough that it does not expand when they are fired. I had problems shooting 45-70 loads in an adaptor because the end of the shell is in the thin neck portion of the adaptor and if the neck portion is not a tight fit to that specific chamber, you get a pressure ridge or expanded area that makes the fired shells hard to remove
cheers mooncoon
cheers mooncoon
I await a report on results!
It would be interesting to run a 31/64" chucking reamer into the adapter to extend the "chamber" to allow the use of 460 S&W brass. Then load as "fat" a bullet as the adapter will allow, made hollow-based and/or with soft lead, as already mentionned. Strictly a handloading proposition of course.
It would be interesting to run a 31/64" chucking reamer into the adapter to extend the "chamber" to allow the use of 460 S&W brass. Then load as "fat" a bullet as the adapter will allow, made hollow-based and/or with soft lead, as already mentionned. Strictly a handloading proposition of course.
antiqueguy
CGN Ultra frequent flyer
- Location
- windsor ontario
.468"-.470" not .460 that's way too small
antiqueguy
CGN Ultra frequent flyer
- Location
- windsor ontario
th adaptor I have has had a .410 reamer run though it .468" right though ive been looking at .460 S&W brass my idea is to get a heel based bullet made that's .468" and a .454" heel make a .470 black powder magnum
I am not sure what a chucking reamer is, but if is one intended to be used in a metal lathe and on the basis that implies that you have access to a metal lathe, why not just make a spade or D bit reamer and dimension it to whatever cartridge or chamber that you want?
cheers mooncoon
If you want to use 460 S&W brass, you're going to need the adapter opened up to 0.478" plus clearance. 31/64" = 0.484375" - just about perfect if you use a heeled bullet. You could leave the area where the bullet is outside of the case at 0.468". My biggest concern here is the resulting thinness of the adapter.
I suppose you could make a reamer, but I'd prefer to buy one for the $25-30 it would cost. I do have a lathe, but I'm not doing this conversion, and the OP and others might not have a lathe. A chucking reamer can be used like any chamber reamer - by lathe, or by hand.
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antiqueguy
CGN Ultra frequent flyer
- Location
- windsor ontario
it will chamber both .45 colt and .410 shotshells it should fit the .460 S&W as near the mouth is where its .468
Then I suppose it will work for you.
I don't load for 460 S&W, but I do for 45 Colt, and I find that with bullets sized to 0.452", that the casemouth measures 0.478" with the brass I use, and I want at least 2-3 thou clearance, hence 0.480"
I have one of the 577/450 - 45Colt adaptors from DS. I used very soft near-pure lead 200gr bullets over 10 gr Unique (chrony'd 1110 fps) and 7gr TrailBoss (1000 fps). They seemed to hit paper reasonably straight-on (no keyholing) at 50 yds, and I did not observe much barrel-leading at all. I had to reduce the rim thickness on the adaptor a bit to fit my 1887 Enfield.
Forgot to mention that I have slugged the barrel and measured .457" with .463" grooves. The boulets must be obdurating a lot, since they are only .452". Not a long-range cartridge-rifle combination for sure, but recoil and report are extremely light. People beside me at the range with their 7mm Rem Mag etc. looked at me with disdain, but little do they know of the pleasure of tinkering with antiques!
Forgot to mention that I have slugged the barrel and measured .457" with .463" grooves. The boulets must be obdurating a lot, since they are only .452". Not a long-range cartridge-rifle combination for sure, but recoil and report are extremely light. People beside me at the range with their 7mm Rem Mag etc. looked at me with disdain, but little do they know of the pleasure of tinkering with antiques!
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I finally got around to miking some Kynock shells that I am guessing were made around 1950 - 60 maybe a bit later. They are paper patched and loaded with smokeless. The core diameter appears to be roughly .451 - 2 and the outside of the paper mikes .472 - .475. The paper is slightly out of round after all of these years and there is a slight variation from shell to shell. I doubt that would make any difference when shot. I am surprised at how thick the paper jacket is; in the past when I have made up PP bullets for various guns, I used .004" thick paper and when dry sized them to about 1/2 that thickness. For example 2 wraps of paper on a .450 core and sized to .458 would leave the paper about .004" thick for the two wraps.
cheers mooncoon
antiqueguy
CGN Ultra frequent flyer
- Location
- windsor ontario
yes its thick paper I forget what the min bore diameter is but I do know the early patern guns are .465 at the muzzle and even bigger at the start of the 8" long throat a .465 to .468 bullet is the best bet for the mk1 mk2 and mk3 pattern guns mk4's tend to like a .468" to .470" bullet ive used but don't recommend a lee .476" 400gr cast in soft lead in my mk4. also ive never heard anyone sizing paper patch bullets most just roll them and let them dry
I have tried that bullet (the Lee 90241) in both my Martini-Henry and my Belgian Albini.
Mine mold drops bullets at 0.473" and 388 grs and I size them to 0.468" using a custom sizer. Works ok for me.
The problem with sizing down much more than 0.005" is that you lose too much lube capacity, and the profile of the bullet can change enough that it has to be seated deeply missing crimp grooves and reducing powder capacity. These old guns have huge case capacity and tend to have very long throats, so that's rarely an issue with them though.
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antiqueguy
CGN Ultra frequent flyer
- Location
- windsor ontario
I have tried that bullet (the Lee 90241) in both my Martini-Henry and my Belgian Albini.
Mine mold drops bullets at 0.473" and 388 grs and I size them to 0.468" using a custom sizer. Works ok for me.
The problem with sizing down much more than 0.005" is that you lose too much lube capacity, and the profile of the bullet can change enough that it has to be seated deeply missing crimp grooves and reducing powder capacity. These old guns have huge case capacity and tend to have very long throats, so that's rarely an issue with them though.
yeah mine cast a bit on the small side too I used them as cast though in unsized cases and crimped them in the crimp groove I figured with the long throat the few thou oversize would not be a problem
antiqueguy
CGN Ultra frequent flyer
- Location
- windsor ontario
because .577-450 brass is about $5 a piece and some of us don't like balloon head brass that is magtech/cbc I for one have about 10 solid head cases and no dies for them lee .577-450 dies suck anyway they over work the brass to size it to the small of the 30+ differences in .577-450 chambers and size the necks down to .458" once some cash starts flowing im going to get some .480 ruger dies to neck size the brass. and .45 colt and .410 are cheaper to shoot and for the people using indoor range's that are only 25 yards it makes more sense to use a .45 colt rather then a 480gr slug and 85gr of fg BP
tactical870
CGN Ultra frequent flyer
- Location
- Buckhorn, Ontario
I was lucky enough to find an old martini which had been converted to 45 colt. Shoots good with .452 lead slugs too. 
Even more fun with subsonic trailboss loads.
Even more fun with subsonic trailboss loads. 
