Hey guys, just wondering if anyone knows the difference between the low serial no. Extractor and the higher no. Extractor. (Above 119___). I can see the difference between the two extractors but is there a difference in the chamber that a low no. Extractor won’t work in a high no. barrel. Cause that’s what I got and the rifle won’t fire and the extractor won’t grab the shell casing. So I’m thinking the bolt isn’t going quite far enough to let the firing pin hit the primer. Any help is greatly appreciated. !!!