Happy Easter. For your viewing pleasure.
Printable View
Happy Easter. For your viewing pleasure.
A Lyman duplex measure. They still work just fine.
Yes, it does!Quote:
Originally Posted by SwissShooter
Neat. I ain't ever seen one. Thanks for sharing.
The predecessor to the Lyman 55!
Nope, that would be the Lyman No. 5. This is a No.6 Duplex measure. Used for loading duplex loads in one drop. The kicker charge would normally be smokeless or semi-smokeless and main charge normally was blackpowder. I still use mine.Quote:
Originally Posted by smithnframe
you are welcomeQuote:
Originally Posted by Bazoo
Does it still have the top? They seem to have gotten lost often. :(
There were three major variants of the all cast iron measure, the Number 5 which later evolved into the Model 55, the Model 6 shown here, whose reason for being sort of died out with decreased use of BP, and the less known Model 5 Micrometer version that disappeared about with WW II, but had a sort of rebirth when Homer Culver invented his micrometer conversion for the 55.
Our correspondent 55 can tell us about the study that was done on these several years ago, but it disappeared in a cloud of electrons. :( We’re still hoping to see it return.
Froggie
"Duplex" and "blended" powder charges were a popular idea in the 1930-40 period. And a dangerous one with little or no benefit so it thankfully died out.
Duplexing became popular as soon as semi-smokers became available *note as indicated by the 16 Aug 1892 patent date. Must have been popular for them to make duplex measure. Some for Pope and others that made them. Semi-smokeless and later smokeless powder was used as a kicker with Blackpowder to greatly reduce fouling. Duplexing is still safely used today for a variety of beneficial reasons.Quote:
Originally Posted by 1hole
http://castboolits.gunloads.com/show...-50-BMG-Powder
http://castboolits.gunloads.com/show...oads-and-slugs
http://castboolits.gunloads.com/show...how-is-it-done
http://forum.accurateshooter.com/thr...loads.2555562/
http://castboolits.gunloads.com/show...s-in-the-4570*
http://castboolits.gunloads.com/goog...26j27368088j14
I think Duplex loading is still very common, I do it. But it does beg the question, why? when smokeless is generally cheaper, easier to get. It just fun ..Quote:
Originally Posted by 1hole
There’s a big difference between a duplex charge and blended powder. With a case full of powder there will be no mixing of the hotter “kicker” charge closest to the primer which then ignites the slower burning stronger charge above. Generally it would be 10% kicker behind 90% main charge. A few shooters even went with triplex leadings, but I’ve never researched the details of that process.
The legendary Harry Pope was a pioneer in the technique and built his powder measure in such a way that the the duplexing mechanism was concealed within the body of his measure. He always looked for the best way to get the job done!
Froggie
Unfortunately, the top is goneQuote:
Originally Posted by Green Frog
patio PM me regarding missing top
dave
PM sent.Quote:
Originally Posted by ascast
What Bazoo said. I've neve seen one either. Are you going to use it? I have an ancient Belding & Mull and I still use it. It is more accurate than my RCBS. I do get a kick out of using old stuff.
Yes, I am currently using it as a black powder measure. Not making duplex loads, though.Quote:
Originally Posted by sharps4590
I found one at a gun show a few years back . Mine is missing the slide for the small side.