I little off topic but somewhat relevant. I went to the range on Sunday to test a couple different ammo options to see what my KIDD prefers. I am using the standard KIDD recoil spring and usually shoot Eley force in long range matches. I was curious to see whether there would be a significant difference in accuracy between different ammo for my barrel. It was an interesting experiment but the key as it relates to this topic is that I could definitely feel a significant difference in the action/bolt movement when I was shooting the force rounds. They are definitely much hotter than the others I tried, which were Eley std, RWS r50, Eley match, SK std, Center-x, Midas+, Eley benchrest semi-auto and X-act. Force measures at an average of 1180fps from my rifle (measured with a labradar over a 100 rounds) so I did not really think of it as an exceptionally hot round, but shooting it back to back with the others I could definitely feel the difference.
As I mentioned, I am currently running the standard spring and Eley force tends to run fairly reliably. However, once in a while and usually during a match (which is when I do most of my shooting; not much time otherwise for practice) the bolt will not completely go into battery and a round will get stuck about three quarters into the chamber. This sometimes also happens when I rack it when preparing to start the stage. When that happens I save those rounds for inspection but thus far they looked good with no obvious damage or irregularities and I do not know if there is any pattern. What I am starting to do now is to number my magazines and document if there is any relation but at this point in time I cannot say definitively whether that could be a contributing factor. I have been wondering if I should switch to the 10% heavier spring but have not tried it yet.
I am currently busy purchasing the parts to build a SCSA rifle and am planning on purchasing a Wiland barrel. Other that about a 1oz weight difference, is there any other difference between the black and stainless barrels? Also, I did not see the option for a benz chamber... that was probably a special order? Is the regular sporter chamber barrel too inaccurate at 50 yards for silhouette? This will primarily be a steel challenge rifle but I would like a little flexibility as well.