Normal break in wear?

[piefairy]

Couple of things. I have been experimenting with oil VS grease for my guns due to a video post on the forum, I forgot where, from a sig armorer saying not to lube the FCU on 320's and that he uses grease instead of oil. I had been staying with grease, but in the last few trips to the range, my X-5 was not fully returning to battery after some shots. I clean and lube after most range trips, so every 200rnds or so. Changing back to oil didn't solve it, I finally noticed the rear sights were loose and I'm thinking the screws were getting in the way.

Anyways, when I broke my guns down today all 3, p320, 320 x-5, and 365 have what look like metal shavings in them. This was using Lucas Extreme duty gun oil. There was still a good film of oil over all moving parts, except the FCU. The guide ears for the slide did have oil. Some of the shavings appear to be brass, which I assume is from the ammo, others I'm not sure. There are a few spots where the black coating is starting to wear off, and the barrel of the X-5 has a decent size chip in the coating where the spring seats. Is this all just normal break in wear? None of these guns have 1k rounds through them yet. Probably somewhere around 500 or so each. I went back to grease this time and I'll see what I get, but I am curious as to these shavings and what may cause them. Photos are attached. Some of it looks like dirt, but it felt metallic. Also, my range is indoors so no clue where it could have picked up that much dirt in a week and a half.





Thanks for the input.

[Spartan1980]

Here's my X5 Legion. About 2000 rounds fired. Just detail stripped the slide and cleaned.
ETA: Yours looks good to go. All I see is normal carbon gunk and some brass from the cases. FWIW, these things seem to run dirty compared to all my others. Could be the lightening cuts in my slide? But after 2k rounds my slide was incredibly filthy. Nothing tangible, just seat of the pants impression.

[piefairy]

Appreciate the input. I'll fire on and consider it normal break in wear for all three. I expected the brass to be from the casings. I haven't been terribly impressed with Fiocchi range ammo.

[JTQ]

Here is another P320 data point

https://slip2000.com/blogs/news/afte...-a-paper-towel