What are the differences?

[mikehemi]

Can anyone tell me the differences between chrome lined barrels and chrome moly barrels?

[Echo2]

Chrome lined barrels have...well...a chrome lining....similar to what a socket set would have on it.....very corrosion resistant.

Chromemoly is an alloy that is throughout the metal in the barrel....very hard....very strong.....high pressure tanks.....drag car frames.....high end bikes....and barrels...are made from it....will still rust...not as quickly....should still be finished.

IIRC.....I know it can be a PITA to get proper welding alloys....wire or filler rods.

[PT945]

Welding chromemoly will depend on what type it is. 4130 has to be heat treated after welding, and special fillers used. Also it has to be tig welded.

[mikehemi]

Would it be worth it to get the chrome lined?

I've heard they are less accurate.

[Echo2]

Welding chromemoly will depend on what type it is. 4130 has to be heat treated after welding, and special fillers used. Also it has to be tig welded.

Cutting strips of the same material from drop pipe....I have oxy/acyt welded it before...no issues.

The issue I have found is that most welding supply stores can order the filler....but rarely have it on the shelf.....I occasionally have them call me cause I keep a bunch of odd ball filler rod in stock.

The heat treating is to relieve the stress the weld makes at the point of contact to the base metal...IIRC.

It can be done with a rose bud and a IR temp gun....and time.....The roll cage was too big for the oven.

-----------------

If you keep your weapon clean and lubed.....chrome lined isn't necessary....IMO.

[slowz1k]

Would it be worth it to get the chrome lined?

I've heard they are less accurate.

You will sacrifice some accuracy, but you'll gain barrel life in exchange. In my opinion, the loss in accuracy is very minimal. Bayou Blaster says this, concerning chrome lined barrels, in another thread::::

One other thing, chrome lined barrels are a great idea from the stand point of: prolonged barrel life, easier to clean, reducing failures to extract and feed. From the standpoint of accuracy NOT SO MUCH. It's a trade-off. No one has yet to figure out how to perfectly/consistently chrome line a barrel to an exacting thickness throughout it's length. Thats why some die-hard target shooters still prefer non-chromed 4140 chromoly or stainless barrels. I would also try different brands and weights of cartridges to find out what your particular firearm likes.

Thread link:

http://www.survivalmagazine.org/survival-forum/showthread.php?3312-What-caliber-AR-Upper-do-you-have&p=35776#post35776

[Bayou Blaster]

Besides Slowz1k's comments:

Would it be worth it to get a chrome-lined barrel? If purchasing your AR-15 or Semi-Auto M-4 configured AR-15 with intentions of utilizing it for survival and prepardness applications, I would strongly recommend getting a Chrome-lined barrel. They tend to function better when you run the firearm hardcore and tend to function more reliably over time and as barrel temp rises. The accuracy difference with carbine variants is negligible.

I would also recommend ensuring that the barrel is chambered in 5.56 x 45mm, that way it will except both the civilian .223 rem and the 5.56 x 45mm NATO ammo. Additionally if you are purchasing an assembled firearm or upper reciever, I would also ensure that the barrel adapter and reciever have the M-4 type feed ramps. Facilitates feeding.

Lastly the tighter the twist rate the heavier bullet it can sling accurately. Most M-4/carbine length barrels are currently served up in the 1/7 or 1/9 twist rate. The military currently utilizes 1/7 twist rate. One must keep in mind that the .223 rem/5.56 x 45 NATO was optimized to be fired from a longer barrel than the 16 inch carbine and shorter SBRs.

Chrome Moly steel includes chromium and molybdenum, and as a result these materials have an excellent strength to weight ratio, and are considered stronger and harder than standard 1020 steel. These grades of steel do contain chromium but it's not enough to provide the corrosion resistance afforded by chrome-lined barrels. Good luck with your purchase. BB.

[mikehemi]

Thanks the information is really helping out guys. I have almost decided.

[Buggyout]

Random Buggy bump!!!!!!

-Buggy

[Tugaloo]

You will sacrifice some accuracy, but you'll gain barrel life in exchange. In my opinion, the loss in accuracy is very minimal. Bayou Blaster says this, concerning chrome lined barrels, in another thread::::

One other thing, chrome lined barrels are a great idea from the stand point of: prolonged barrel life, easier to clean, reducing failures to extract and feed. From the standpoint of accuracy NOT SO MUCH. It's a trade-off. No one has yet to figure out how to perfectly/consistently chrome line a barrel to an exacting thickness throughout it's length. Thats why some die-hard target shooters still prefer non-chromed 4140 chromoly or stainless barrels. I would also try different brands and weights of cartridges to find out what your particular firearm likes.

Thread link:
http://www.survivalmagazine.org/surv...5776#post35776

FN offers chrome plated barrels.

https://fnamerica.com/manufacturing/gun-barrels/

Quality Through Processes
By using the most advanced automated manufacturing processes, FN barrels are certain to be of the highest quality at the most efficient cost. Our hammer-forged, chrome-plated barrel is legendary in the firearms industry for its precise accuracy and long life. Our button-broached barrel is of such high quality, a breaking-in period is not required, and it will shoot accurately right out of the box.

Selection
We produce a complete range of pistol (including threaded barrels) and rifle barrels for commercial firearms, as well as rifled tubes for sniper weapons and machine gun barrels for military and law enforcement customers.

We can meet virtually any caliber requirement and can produce lengths ranging from 4.0” to 28” and a wide variety of profiles, from light to heavy. Finishes include manganese phosphate, stainless steel, and hard and soft chrome.

From 1960 until 1974, FN Herstal offered a bolt action with a chrome plated bore. It was a very accurate rifle.

My wife used to work for FN in Columbia, SC.

[RICHFL]

Let get real! Just how many shots will you take over 250-309 yards away? Not many. Most combat is close no more then 75 yards. Look at the after action reports from the last 20 years. Long distance needs a sniper equipment, training and weapon system.....

Hunting I will never use a light weight round!!!

[Tugaloo]

Let get real! Just how many shots will you take over 250-309 yards away? Not many. Most combat is close no more then 75 yards. Look at the after action reports from the last 20 years. Long distance needs a sniper equipment, training and weapon system.....

Hunting I will never use a light weight round!!!

Combat ranges have changed in the "sand box."
When the Muj fought the Russians, the Muj would shoot and scoot using their .303 Brit or whatever when they were out of the AK-47/74's range.
Having a caliber with more effective range of engagement than one's opponent is wise in combat.

In the sand box, the Army issued M14s using 7.62x51 or a long barrel M16 using the 77 gr match grade Mk 262 Mod 0/1 which extends the range significantly to DMRs (Designated Marksman Rifle). A DMR is a very good shot; OTOH, a sniper he is not.
I'd bet the Marines have done something similar.

AA53, Cartridge, Caliber 5.56mm Special Ball, Long Range Mk 262 Mod 0:

The Mk 262 Mod 0 quickly earned an enviable reputation in Afghanistan for excellent accuracy and superior terminal performance. Kills were made with this load out to 700 meters. According to one account, in one engagement two SF operators armed with SPRs killed 75 Taliban with 77 rounds.

https://www.globalsecurity.org/milit...ions/mk262.htm

[Garand]

Let get real! Just how many shots will you take over 250-309 yards away? Not many. Most combat is close no more then 75 yards. Look at the after action reports from the last 20 years. Long distance needs a sniper equipment, training and weapon system.....

Hunting I will never use a light weight round!!!

I live on the bald arsed prairie, where a dog has to travel 3 days to find a tree to piss on.

[Tugaloo]

I live on the bald arsed prairie, where a dog has to travel 3 days to find a tree to piss on.

That was a classic keeper! ROTFLMBO.

RICHFL: Combat ranges are established by the current operational theater. The weakness of our Military is they use the last war as the base to plan the next war.
Afghanistan changed that. The Army reissued M14s and created the DMR or Designated Marksman Rifle. In Basic, I qualified "expert" with a "rode hard and put up wet" M14.
The US Military selected the Hornady 6mm ARC.

https://www.gunsandammo.com/editorial/hornady-6mm-arc/376852

I seriously call bull baloney on the supersonic passed 1000 yards as to the average Grunt can't hit diddley squat at that range.

[Armyjimbo]

Yes it's an intermediate round, but don't forget that bc's and all that. I'm kinda shocked more forces are not going to this as the 5.56 is proving to be anemic vs other rounds available. Serbia did it right by adopting the 6.5 Grendel which out preforms the 7.62x51, past 350m. But its out of a smaller sized package.