Edit: 4/6/2020 - Contact made with PTR - sending rifle in for inspection.
I posted this in the H&K subforum but wanted to crosspost here, sometimes I feel like I get more engagement out of the HTF than I do elsewhere... at least I used to the last time I was more active on this site.
Link to OP in H&K SubforumOP:
Quoted:
I have FTFs every now and then where the bolt slams shut (partially) on a halfway fed round, usually disforming the case. It happens every now and then on the surplus aluminum 20s I have, while it happens all the time multiple times per magazine) on some steel 20s I just bought. The steel 20s were still in wrap and some in plastic, but all dried out with some corrosion/rust to varying degrees.
I am inclined to think that these issues are magazine related - I haven't really paid much attention to trying to track whether it is tied to specific mags yet but will label them to do so going forward.
That said, the steels for sure need some kind of remedy, they are rough and stick and don't feed as stated above. Is sand/bead blasting a good way to go here? Dremel? What else?
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I'd like to be able to use this rifle for feral swine and maybe run a class or two with a "heavy" but until this is resolved I do not have 100% trust in the rifle yet, and that's not useful.
Also - yes, I know mags are cheap and I could buy 30 and keep the best 10, don't worry I'll probably buy another batch soon because I have a problem like that... but I just like the idea of fixing them and making it a little more personal.