A guy I know brought over an over/under 12ga percussion smoothie. It appears to be a commemorative for a Beretta anniversary. I've done some looking but I like insights from members on here. Any idea of an era where an O/U would have been used ?
Over/Under Percussion 12 ga.
- Thread starter blackhorse
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Here is an article regarding a flintlock era O/U, the writer is wrong about the one maker. It was Joseph Egg who was in partnership with Tatham not Durs Egg. Disregarding that, O/U's have been around a long time.
Very cool: A flintlock British O/U by Tatham & Egg... - Dogs and Doubles
Very cool: A flintlock British O/U by Tatham & Egg... - Dogs and Doubles
There have been plenty of write up on these guns they can cause a problem with the bottom barrel mainly because of loading them with hammers at half cock , these guns should be loaded with hammers down . I bought my pair in late 1980s customised them , hardened the main springs tuned the locks and finished the stocks ,Both of these guns never give me trouble and I can fire over 100 shots in a outing . See my thread in the Hunting forum under Spring Barley.
Feltwad
Feltwad
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I like that.
I would of thought a super imposed would be more reliable in flint than cap!
My recent journey with mine, all four pages.
Your friend may find it interesting.
https://www.muzzleloadingforum.com/threads/beretta.128293/
Your friend may find it interesting.
https://www.muzzleloadingforum.com/threads/beretta.128293/
Elgatodeacero
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It was the cause of added device of the flash channel to the bottom barrel which caused a void , this was change to igniting the bottom barrel and not true to the original , for it too work large flash hole nipples were used these were 1/4 UNF to eliminate the void the hammer was down to stop any escaping powder been lost from the compression of air at half cock this was the opposite on several occasions which left a void from the main charge . Some tried different ways such has enlarging the nipple hole and fixing a 5/16 musket top hat nipple hoping the larger would create a bigger flash this caused a problem with ignition from the weak main spring ,others tried a smaller flash hole in the nipple and this was also bad because the compressed air could not escape in quantity so this also became a void .This added devise had other problems one main was the escaping gas from the screw on the underside of the bottom barrel which after some time burnt a hole in the stock for which I came across several . Maybe I was lucky but I stuck to my theory that the large hole nipples that were supplied with the gun and loaded with the hammer down proved a certain ignition every time . has I have said before I can fire a 100shots in one session and not have a misfire
Feltwad
Feltwad
I understand what you mean now. Keep the hammer down and you get a few grains of powder in the nipple to boost the cap.
I looked at opening my nipples but noted they are already my preferred diameter of around .040" or 1mm so I worked on flowing the screw in flash channel but then as you point out had to seal the threads and bull nose.
The breach plugs are nicely coned to begin with I think.
