Didn't get a response from anyone who has tried these, so I decided to take a chance and order a selection of the sporting clays extended chokes to try out.
So far I have to be impressed with the service from these people!
I rec'd my chokes within 5 days (from Georgia, USA) and they arrived in a perfectly serviceable hardshell, protective cloth-lined case.
Next, we'll see how they pattern.
They are reasonably priced, especially with our dollar being so strong. The Titanium version is a bit more expensive however, being more in the order of the cost of similar Brileys etc.
Info from their website: http://www.trulockchokes.com/
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So far I have to be impressed with the service from these people!
I rec'd my chokes within 5 days (from Georgia, USA) and they arrived in a perfectly serviceable hardshell, protective cloth-lined case.
Next, we'll see how they pattern.
They are reasonably priced, especially with our dollar being so strong. The Titanium version is a bit more expensive however, being more in the order of the cost of similar Brileys etc.
Info from their website: http://www.trulockchokes.com/
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PRECISION HUNTER
Our Precision hunter style chokes are extended, knurled and notched for use with a choke wrench. They are manufactured from high strength 17-4 PH stainless steel with an extremely smooth interior finish. They are suitable for use with steel shot from cylinder through improved modified. All chokes are marked on the head with the degree of choke and on the body with the exit diameter. There is no difference between the Precision Hunter and the Sporting Clay chokes except for the low glare black oxide finish. High quality, low maintenance, known constrictions and a reasonable price!

SPORTING CLAYS
Our Sporting Clay style chokes are extended, knurled and notched for use with a choke wrench. They are manufactured from high strength 17-4 PH stainless steel with an extremely smooth interior finish and are the perfect choice for skeet, trap or sporting clays. If your club so requires these chokes can be used with steel shot from cylinder through improved modified constrictions. All chokes are marked on the head with the degree of choke and on the body with the exit diameter. High quality, low maintenance, known constrictions and a reasonable price! 
SUPER WATERFOWL
These chokes are extended, knurled and have a black oxide finish. they are available in three degrees of full choke- .030, .040, .050 and were specifically designed for use with steel and other environmentally friendly shot. this is the ultimate choke for LONG RANGE pass shooting of waterfowl. All Super Waterfowl chokes are manufactured from a unique grade of alloy steel that has a strength level of approximately twice that of 17-4. they are marked on the head with the degree of choke and on the body with the exit diameter. 
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