harleyfan Posted February 6, 2017 Share Posted February 6, 2017 I just bought a used STI DVC Limited 9mm. The gun is in great shape, but I noticed that the TIN finish is gone from the feed ramp and underside of barrel hood. I wonder if this wore off or did some enterprising individual think this area needed to be polished? Link to comment Share on other sites More sharing options...
shooterDrew Posted February 6, 2017 Share Posted February 6, 2017 The TiN has worn off of my feed ramp through normal shooting (no polishing done by me)Sent from my iPhone using Tapatalk Pro Link to comment Share on other sites More sharing options...
harleyfan Posted February 6, 2017 Author Share Posted February 6, 2017 The TiN has worn off of my feed ramp through normal shooting (no polishing done by me)Sent from my iPhone using Tapatalk ProGood to know! Thanks.Sent from my XT1585 using Tapatalk Link to comment Share on other sites More sharing options...
ltdmstr Posted February 7, 2017 Share Posted February 7, 2017 I doubt the finish being gone from your barrel ramp is due to bullet contact since the bullet's certainly not hitting the entire ramp surface. Sure looks to me like someone modified or at least polished the ramp. Also TiN is a pretty hard surface treatment and should take a LOT of rounds before it starts showing wear from contact with copper/lead/etc. Link to comment Share on other sites More sharing options...
harleyfan Posted February 7, 2017 Author Share Posted February 7, 2017 Kinds what I was thinking.Sent from my XT1585 using Tapatalk Link to comment Share on other sites More sharing options...
shooterDrew Posted February 7, 2017 Share Posted February 7, 2017 Makes sense. I can say that's how it came to me from sti. Sent from my iPhone using Tapatalk Pro Link to comment Share on other sites More sharing options...
harleyfan Posted February 7, 2017 Author Share Posted February 7, 2017 There was no TIN on the feed ramp when it was new?Sent from my XT1585 using Tapatalk Link to comment Share on other sites More sharing options...
shooterDrew Posted February 7, 2017 Share Posted February 7, 2017 To be honest I did not really make a point to look. I've put a little over 3000 rounds through the gun and the feed ramp is pretty uniformly polished. I haven't polished it and a pretty reasonable point was made that it wld take a lot of rounds to "polish" it and it would not be so uniform. I'm pretty confident that it looked he same when I got it new. Sent from my iPhone using Tapatalk Pro Link to comment Share on other sites More sharing options...
Woodsk Posted February 7, 2017 Share Posted February 7, 2017 My DVC Limited had a polished feed ramp from STI Link to comment Share on other sites More sharing options...
harleyfan Posted February 7, 2017 Author Share Posted February 7, 2017 Very good. Thank you for the info.Sent from my XT1585 using Tapatalk Link to comment Share on other sites More sharing options...
epracmetcon Posted February 9, 2017 Share Posted February 9, 2017 My DVC came with a polished ramp brand new out of the box. Link to comment Share on other sites More sharing options...
harleyfan Posted February 9, 2017 Author Share Posted February 9, 2017 My DVC came with a polished ramp brand new out of the box.That's good to hear. I guess they send those out for Tin prior to polishing.Sent from my XT1585 using Tapatalk Link to comment Share on other sites More sharing options...
JAustin316 Posted February 10, 2017 Share Posted February 10, 2017 TiN is not as durable as I once thought it was... if it bugs you these guys can recoat it.http://www.warfrogindustries.com/tin.html Link to comment Share on other sites More sharing options...
harleyfan Posted February 10, 2017 Author Share Posted February 10, 2017 Thank you!Sent from my XT1585 using Tapatalk Link to comment Share on other sites More sharing options...
Krumble Posted February 10, 2017 Share Posted February 10, 2017 My DVC Open came with a brightly polished feed ramp that wasn't TiN coated out of the box. The TiN seems pretty durable to me so far. I have been scraping away at the compensator with bronze brushes and a brass scraper to get the carbon out and haven't managed to put a scratch on it yet. Also not a single scratch or sign or wear on the outside of the barrel with several hundred rounds through it. My stainless KKM bull barrel showed pronounced signs of wear after the first 50 rounds. The TiN coating seems to be in the last half inch of the bore and in the chamber and is wearing there but the coating there is presumably just an unavoidable by-product of the coating process. At first glance I thought I had thick copper or even rust in the end of the bore! Link to comment Share on other sites More sharing options...
gerritm Posted February 10, 2017 Share Posted February 10, 2017 3 hours ago, Krumble said: My DVC Open came with a brightly polished feed ramp that wasn't TiN coated out of the box. The TiN seems pretty durable to me so far. I have been scraping away at the compensator with bronze brushes and a brass scraper to get the carbon out and haven't managed to put a scratch on it yet. Also not a single scratch or sign or wear on the outside of the barrel with several hundred rounds through it. My stainless KKM bull barrel showed pronounced signs of wear after the first 50 rounds. The TiN coating seems to be in the last half inch of the bore and in the chamber and is wearing there but the coating there is presumably just an unavoidable by-product of the coating process. At first glance I thought I had thick copper or even rust in the end of the bore! Mine came this way also. All polished up. Been very tough so far. No other signs of wear. gerritm Link to comment Share on other sites More sharing options...
ghosty Posted September 12, 2017 Share Posted September 12, 2017 Just looked at my dvc limited. Supposedly just over 500 rounds through it. Feed ramp looks like it has been polished but it still has the tin coat. It's shiny, not matte like the rest of the barrel. Reckon sti polishes them if needed from the factory? Link to comment Share on other sites More sharing options...
MikieM Posted September 14, 2017 Share Posted September 14, 2017 The feed ramp is polished after the barrel is coated. You wouldn't want a matte finish on the feed ramp. Link to comment Share on other sites More sharing options...
jaques Posted September 14, 2017 Share Posted September 14, 2017 I have 3 DVC guns and the feed ramp is NOT polished on the Limited 9mm or 3-gun, but it IS polished on my limited .40 Link to comment Share on other sites More sharing options...
steveac1 Posted September 14, 2017 Share Posted September 14, 2017 My DVC 40 did not have the TiN coating. Link to comment Share on other sites More sharing options...
jimbullet Posted September 17, 2017 Share Posted September 17, 2017 my DVC limited 40 does not have the Tin on the feed ramp which looks polished. not too fussed about the ramp as long as it feeds well. Link to comment Share on other sites More sharing options...
dansedgli Posted September 17, 2017 Share Posted September 17, 2017 Dvc at my club is polished but no tin on the ramp. My infinity has tin on the ramp and shows zero wear. Link to comment Share on other sites More sharing options...
3gunDQ Posted September 17, 2017 Share Posted September 17, 2017 22 minutes ago, dansedgli said: My infinity has tin on the ramp and shows zero wear. My SV 38sc pistols have TIN on the ramp... my SV 40 has a polished ramp. Link to comment Share on other sites More sharing options...
Benevolence Posted September 17, 2017 Share Posted September 17, 2017 I would be surprised if they wore off after just a couple thousand rounds. Talking to a guy that does these coatings for multiple industries, often times people think the coating is wearing off but it's just metal being deposited onto them and covering them. That said, they are only ~5-10 microns thick (0.0002-0.0005"). Link to comment Share on other sites More sharing options...
mach1soldier Posted September 17, 2017 Share Posted September 17, 2017 My dvc classic has a coated ramp and barrel. It has over 25k rounds with no wear anywhere. It is crazy durable in my opinion. Link to comment Share on other sites More sharing options...
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