APC223 high round count

[Wesleyjenn]

Thinking about picking up a APC223 for a half decent deal buddy says the round count is around 2000 just worried about round count I’m not real familiar with this platform be about $1600 less than retail. Thanks for any response

 

[Yaboisharkmouse]

2000 is still very low round count relatively speaking. I'd take the deal. I'd only worry about a round count of 2000 if you were talking about a Turkish shotgun.

 

[Wesleyjenn]

Ok awesome thanks

 

[IanON]

Those barrels are probably good for what 8-10k rounds before the groups start to open up?

If you are getting it cheap (ish) I wouldn't worry about 2k.

 

[greentips]

Nitrided barrel should be good for at least 10,000 rounds of copper jacketed ammo and more depending on the steel and purity of the steel. I think B&T uses lothar Walter and based on my experience of B&T gun it doesn't use the low end steel. Rd count of steel/bi metal jacketed ammo I will apply a multiple of 3 to get to the equivalent of copper jacketed ammo.

 

[Bratwurst]

Nitrided barrel should be good for at least 10,000 rounds of copper jacketed ammo and more depending on the steel and purity of the steel. I think B&T uses lothar Walter and based on my experience of B&T gun it doesn't use the low end steel. Rd count of steel/bi metal jacketed ammo I will apply a multiple of 3 to get to the equivalent of copper jacketed ammo.

20.000 is no drama

 

[Junction]

Nitrided barrel should be good for at least 10,000 rounds of copper jacketed ammo and more depending on the steel and purity of the steel. I think B&T uses lothar Walter and based on my experience of B&T gun it doesn't use the low end steel. Rd count of steel/bi metal jacketed ammo I will apply a multiple of 3 to get to the equivalent of copper jacketed ammo.

Very interesting information.
I would have thought that steel or bi-metal jacketed would be "harder" on the barrel then copper jacket / common FMJ .223 rounds.

One of the reasons I chose 308win over 6.5creed was because from what I've heard, the smaller necked cartridges can/will erode the chamber throat more quickly.
I've read with 6.5creed the barrels can be shot out with as little as 2-3k rounds. (Not a problem for me, as I lack enough money and free time to accomplish that! haha)

Interesting discussion.

 

[greentips]

Yes, What I mean is that 1 round of bimetal = 3 rounds of copper jacket for round count record. That's the rule of thumb when I log round count to my record when people use my guns.

If someone put 100 rounds of bimetal thru my gun, I log 300 rounds to my book.

The intelligent question to ask is "What kind of rounds do you shoot through your gun?" If you know your friend like bimetal I will adjust the round count upwards by a multiplying factor of 3 for nitrided barrel and chromelined barrel.

If it is through a SS barrel, I will walk away.

That's my opinion, YMMV.

 

[Sniffer]

Yes, What I mean is that 1 round of bimetal = 3 rounds of copper jacket for round count record. That's the rule of thumb when I log round count to my record when people use my guns.

If someone put 100 rounds of bimetal thru my gun, I log 300 rounds to my book.

The intelligent question to ask is "What kind of rounds do you shoot through your gun?" If you know your friend like bimetal I will adjust the round count upwards by a multiplying factor of 3 for nitrided barrel and chromelined barrel.

If it is through a SS barrel, I will walk away.

That's my opinion, YMMV.

Why's that?

 

[SigWig]

^SS is going to wear faster then chrome. Better for accuracy but will wear faster

 

[greentips]

Saying that, a lot of if not most 7.62 NATO is bimetal jacketed.

So I only apply this idea mostly to small bore 223/5.56. Taking a 1nm off means more to the circumference of a 223 bore than a 308 bore.

and that's my guess why the government did not go the cheaper route with 5.56 using bimetal.

Also want to point out that Swiss does use bimetal jacketed GP90 on SG550 - SG550 barrel is nitrided.

 

[Junction]

While you're here Greentips, do you have any thoughts on barrel cleaning?
[sorry in advance, don't mean to de-rail the thread]

My experience has taught me that I should clean periodically, (1-3x /year in my case) but there is such a think as over-cleaning a barrel.
(I'm not talking about .22lr or any other lead projectiles. )

"Clean it when it start shooting poorly, not before"

Can you confirm or add any input? (talking about 223/308 with FMJ ammo specifically)
TY!

 

[nitroxace]

tagged

 

[greentips]

here are my thoughts:

For semi automatic range guns shooting clean ammo not subjected to water and sand, I don't touch the barrel for at least 1000 rounds if it is chromelined. I don't even do anything aggressive at 1000 - run a bore brush down a few passes ( really to quickly push out the lose carbon) so I can see what it is underneath the dirty, inspect and call it the day.

And nitrided barrel - it is based on what it is. B&T barrel - my limited experience showed me there is not much to clean off the barrel even after 1000 rounds. in the US I think QPQ melonite is the dominant process, in Europe it is something else under a different name. I suspect it depends on how polished the bore is before it is put through the hardening process. Nitriding a bad barrel will just end up being a bad barrel any ways. same goes with chromelined barrel. Chromeling tofu doesn't make the tofu better, it just adds a crispy icing on top.

As the barrel gets older, the rifling near the throat will start caking up. It looks nasty but there is nothing you can do about it.

People who shoot mostly SS barrels and unlined barrels will have totally different regime, I don't shoot SS ad unlined barrels often, especially in the last few year all my precision ARs have been in jail. I can't really offer too much opinion. But my old MK12 with a high end compass lake engineering SS barrel doesn't really need that much scrubbing at all, I think I only took a look at 500ish and gave it a quick scrub after 1000.

YMMV