<P style="MARGIN: 0px">Since there has been some interest express in the Terror chokes, I thought I would post on how to tighten them, since they have no notches cut in them for a choke wrench.</P> <P style="MARGIN: 0px"> </P> <P style="MARGIN: 0px">In order to maximize the strength of the tube, Sure Cycle does not cut notches in the ends of their Terror chokes. Instead, they knurl the end to give some purchase on the tube while tightenng. While the Terror chokes (and Wad Wizard chokes, which are also made by Sure Cycle) are manufactured to closer tolerances than most other choke systems, I don't like to just hand tighten any chokes in the barrel. You can get away with that when shooting lead, but I have seen too many chokes loosen after a few shots, and that creates more stress on the barrel and choke threads on the passage of the shot charge through the choke. </P> <P style="MARGIN: 0px"> </P> <P style="MARGIN: 0px">I saw one fellow's Rem. 870 Express lose a choke while duck hunting for that reason, a failure to properly tighten the choke when shooting steel shot. It just came out with a shot and was lost somewhere in the marsh. He had been offered the use of a choke wrench but declined, to his dismay, during the hunt he later discovered his choke was missing from his barrel.</P> <P style="MARGIN: 0px"> </P> <P style="MARGIN: 0px">I use a section of plastic tube cut from a 10ga. Rem. hull, slit down one side and wrapped around the knurled portion of the choke. I use a standard pliers, opened up, and grasp the plastic encased tube, applying just enough pressure to turn the tube, but not cut through the plastic. When the tube starts to slip inside the plastic, it is tight enough. You will have to replace the plastic every so often to prevent the pliers from cutting through and marring the tube. </P> <P style="MARGIN: 0px"> </P> <P style="MARGIN: 0px">Before using any choke tube, be certain to put a choke tube lube or molybdenum disulfide grease (Never Seize) on the threads. If you don't, the choke, or the threads in the barrel, can rust and the choke can become seized. Some times you can remove them, some times you can't. If you put a choke in and leave it for a long time, as do I, you can just wrap the threads with Teflon pipe thread tape, wrapped to tighten as the choke is screwed into the barrel. It won't loosen until you do it.</P> <P style="MARGIN: 0px"> </P> <P style="MARGIN: 0px">The Terror choke is not made from stainless steel. It is made from chrome molybdenum steel (4130) which is similar to that used in making blued steel high power rifle barrels. However, it is heat treated to about 42 C on the Rockwell scale. Most factory high power rifle barrels are about 30 C, so they can be button rifled. However, this greater strength comes at a cost, that being you must clean and oil the Terror choke or it will rust.</P>