The internals of the SS Indian Creek BDS chokes are different.

[3" 870 Shell Shucker]

There's more going on than just a switch to Stainless Steel. 

I already had an original style BDS choke in .665 Remchoke, and my wife gave me one of the new SS chokes in .665 INV+ for Christmas.

Looking at the inside of the choke, the SS choke has more wad catching rings than the original choke does.  The most noticeable is a wad catching ring about half-way down the length of the 30 parallel ports.

It appears that Indian Creek is still experimenting with the design, trying to squeeze out as much performance as possible.

[Gobble!]

Surprised this is the first we have heard this. Can you post some pics?

[allaboutshooting]

There's more going on than just a switch to Stainless Steel. 

I already had an original style BDS choke in .665 Remchoke, and my wife gave me one of the new SS chokes in .665 INV+ for Christmas.

Looking at the inside of the choke, the SS choke has more wad catching rings than the original choke does.  The most noticeable is a wad catching ring about half-way down the length of the 30 parallel ports.

It appears that Indian Creek is still experimenting with the design, trying to squeeze out as much performance as possible.

It has a wad stopper ring in the ported area? Have you shot that choke?

Thanks,
Clark

[3" 870 Shell Shucker]

It has a wad stopper ring in the ported area? Have you shot that choke?

Yes, it clearly has a ring in the middle of the ported area.  I've owned a few of these, and this was a surprise to me.  I thought that maybe it was part of the new SS design.  I haven't shot it yet.  It's too cold right now for good patterns.  Can't post any pics.  Sorry.

I'm not at home right now, but there are 4 or 5 wad catcher rings prior to the ports, and then another ring half way down the length of the ports.  I thought that maybe they were tweaking the BDS design?  This one came straight off the rack at the BPS in Pearl, MS.

[mcgruff1533]

My original Indian Creek BDS did the splits and was replaced by the company with a new SS model.   I can't compare the two side by side, but I can say the SS model outshoots the older model.

Not sure if it makes a difference, but mine was a standard Invector model.

[Gobble!]

My original Indian Creek BDS did the splits and was replaced by the company with a new SS model.   I can't compare the two side by side, but I can say the SS model outshoots the older model.

Not sure if it makes a difference, but mine was a standard Invector model.

does your new choke have the wad stripper in the ports as well?

[mcgruff1533]

My original Indian Creek BDS did the splits and was replaced by the company with a new SS model.   I can't compare the two side by side, but I can say the SS model outshoots the older model.

Not sure if it makes a difference, but mine was a standard Invector model.

does your new choke have the wad stripper in the ports as well?

It sure does.