Hi Jer, the mag insertion issue was caused by a small but very pronounced outwards dent, dimple, in the mag tube, stopping the mag at about an inch from going in? Very easy to repair, no problem. I can't see where anyone could have done anything to the mag that it wasn't made with? I think it was probably made on the close tolerance side, and perhaps got a slight crush some where in the last 100 years? Nope nothing that was your fault. It was an invisible issue? Needed to be measured to be discovered.. They both work perfectly now... It is a fortunate occurrence that the NUMRICH manufactured drums are so close of a copy we can swap parts and repair original serial numbered drums!
Best to you Jer, til.....lat'r.....GT....
BTW, loader looks 100% original & correct to me? Fits both drums perfectly... best, GT