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Unread 04-18-2017, 07:54 PM   #1
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I agree completely Dave but just what are ogee chokes?
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Unread 04-18-2017, 09:30 PM   #2
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I agree completely Dave but just what are ogee chokes?

Rich, I have a LOT of Austin's charts and graphs that he plotted on chambers, cone tapers, bore measurements, and chokes - which Austin determined to be 'ogee' in shape.

"A double curve with the shape of an elongated S."

"Shaped somewhat like an S, consisting of two arcs that curve in opposite senses, so that the ends are parallel. It is a kind of sigmoid curve."

An 'ogee' choke profile is unlike the chokes cut by most other shotgun makers in that theirs is a 'cone' with a definite shoulder at the end of a straight walled tube and without the terminal 1/4" - 3/8" parallel walled section at the very muzzle that Parker chokes usually had.

Is that clear?.....I tried to be.






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Unread 04-18-2017, 09:41 PM   #3
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Here ya go Rich,
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File Type: jpg PARKERANALYSISdoc.jpg (273.3 KB, 10 views)
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Unread 04-18-2017, 09:44 PM   #4
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Garry, Right around 8000 psi. It very hard to get pressures much lower than that and get a complete burn. Remember the smaller the bore the higher the pressure. This load I gave you is a joy to shoot.
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Unread 04-19-2017, 08:20 AM   #5
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Garry, Right around 8000 psi. It very hard to get pressures much lower than that and get a complete burn. Remember the smaller the bore the higher the pressure. This load I gave you is a joy to shoot.
Dave,

Many thanks! I've order the wads and will give this load a try. I appreciate your time in helping me.
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Unread 04-19-2017, 10:59 AM   #6
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Gary I shoot a similar load in my 16's both fluid steel and Damascus with no problem. SR 7625 has been discontinued but if it changes to Unique be sure to work up gradually as the two powders might have different burn rates.

Dave & Dean thanks for the choke info. In all honesty I was just giving Dave a hard time because I thought he was having a senior moment with his grammar It's good to learn something new thanks
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Unread 04-19-2017, 12:56 PM   #7
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Gary I shoot a similar load in my 16's both fluid steel and Damascus with no problem. SR 7625 has been discontinued but if it changes to Unique be sure to work up gradually as the two powders might have different burn rates.
Rich,

Thanks! I have some SR 7625, so I'm good for the near future. I don't quite understand the comment "if it changes to Unique." Sorry to be slow-witted (I know I am, my wife tells me all the time!). Are you saying that I might substitute Unique for the 7625, or is the manufacturer suggesting this...or whoever developed the load is suggesting it? I don't have the capability to monitor pressures, so I'm a bit confused about this.
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