Do you have details on this? Ive been using seekins or vortex pmr (manufacteted by seekins) rings for 8 years or so, I think 5 sets, always torqued per ring instructions (ie tight!). These rings are very popular and I think between folks I shoot with these are by far the most common rings I see, I think Im “near” another dozen sets. I have seen the photo you posted of the broken ring clamp, heard Form mention he has seen a couple problems. On the flip side I’ve never had a problem or seen a problem on any of the ones Im familiar with, and while I have heard of a few issues it seems uncommon…I hear of far more issues caused by the uni-mounts for instance. Question is, 1) is this really widespread enough to put them on a “stay away from…” list? And 2) my understanding, possibly wrong, was that at least most of the other rings listed also have aluminum base clamps…am I mistaken on this point? It looks like UM premier might use a titanium clamp on one side but their tikka rings are aluminum, warne mtn tech appear to be aluminum, etc.
Curious on this point, as for a long time these rings were the ones many people recommended after someone had a problem.