Mac:
Thank you for your insight on the hinge pins. I'll admit I've never gone to that point of looking for the QC problems. And it is really a shame that we find this type of QC issues in todays rifles. I first started working with H&R Toppers in 1970. I belonged to the Red River Rifle & Pistol Club, in Burkburnett, TX. We were a large group, with approx 40 - 50 members. We hosted at our range the Boy Scout Troops from Sheppard AFB and Wictha Falls, both while they were working on their Firearm Safety Merit Badges, and any time they wanted to just come shoot. The Toppers were very poplar, and we had many show up at the range in 30-30 and 357. (There probably were other cal also, I just didn't take notice because I had a 30-30 and 357.) Not once did we ever hear of a action springing open on firing, a stuck case or find one that would not group three into 2 inches @ 100yds. And, it seems we find the same performance in the current rifles of those calibers. That's why I feel these problems are somewhat caliber sensitive. What all of these cals have in common, besides the rim and tapered profile, is low pressure. That's why I will alway recommend a 30-30 over a 243, or 30-06 over a 308, if either will get the job done. Lower pressures. They may of improved the metals used in their manufacturing, but the design itself is a limiting factor.
I was sorry to hear of the 38-55 shooting loose. I know a lot of work went into the testing and developing the loads. I have never heard of anyone putting so many rounds thru a Handi action. I"ll bet NEF has never heard of it either. Will be interesting to see how the Handi's stand up to several seasons of p'dog shooting, because that is the only other place I can see that kind of use. I hope shooters will keep records. Good luck in your quest for answers. I'm sure you will share them with us and NEF.
Wally