I recently purchased a Remington STS Premier with Pro Bore choke tubes. I was aware that the Pro Bore chokes are made for the back bored barrel. The shotgun came with five chokes and I am trying to find the smae "brand".
The choke holder case is unmarked as are the chokes, excepting the choke designation.
They are extended, silver, knurled with engraved rings on the extended portion of the choke. The number of rings designate the constriction.
Does anybody know who makes them? I have looked at the Remington site and I could not find anything. 'Course, I could have missed them.