.577 snider to 209 primers

T

triggerman42

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Hi all. I managed to pick up a few .577 Kynoch cases with the intension of converting them to 209 shotshell primers.
The recommended method is to drill out a new flash hole from the inside out ,with a 15/64 drill bit , removing the the Berdan anvil at the same time. There is supposed to be a dimple or indent between the two berdan flash holes,that is inline with the anvil , and acts as perfect centre to start drilling.
I see no indent . I've deprimed ,washed + scrubbed the insides of these cases clean , so it's not just a poor visability problem. I have looked with a light. I have felt for an indent with an awl , in case I'm just blind , and I can feel no indent. Scratching my head here !
 
id not go full on with a 15/64 drill bit drill a pilot hole with a small bit then step up. id also anneal those cases well as they will tend to be brittle if they were not cleaned after being shot with black powder and or mercuric primers
 
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Annealing is done to the top portion of the cases.Around the mouth + down a bit . Nobody anneals the bottom of the cases where the primer pocket is and where the drilling is done. Although I have already annealed them, I did'nt want to get into talking about annealing. I didn't even mention annealing. I was talking about the non present dimple between the twin primer holes , which surprised me . I was expecting it to be there after what I had read. And it wasn't.
As for the approx age of these cases , I have no idea. They are not balloon head though. The bases are thick + heavy.
One odd-ball case was included in the bag with the these Kynoch cases.
It is a turned case headstamped "N.D.F.S. . I'm gonna set that one aside and just keep it , as it's the only turned brass case I have.
Not sure how long N.D.F.S. has been out of buisness, or if this case's age is relevant to the the other ones in the bag. Who knows!

Oh well .... no dimples. Plan "B" here I come. One must always have a plan "B". Just in case , the case , is a strange case. lol
 
I don't suppose you have access to a lathe, or a friend with a lathe, etc? Just chuck them up and drill them from the outside.
 
antiqueguy said:
id not go full on with a 15/16 drill bit drill a pilot hole with a small bit then step up. id also anneal those cases well as they will tend to be brittle if they were not cleaned after being shot with black powder and or mercuric primers
Click to expand...

I don't think I'd use a 15/16 bit either.;)

Doubt that annealing would undo the harm done by mercuric primers - which can cause a metallurgical change in the alloy of the case.
 
NDFS (North Devon Firearm Services) was a one-man machinist company run by Jim Goodwin in Braunton, Devon, UK, making lathe-turned brass, and also reloading die sets and bullet moulds for antique/oddball calibres. I believe he retired about 15 or so years ago.
 
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