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Posted: 6/27/2013 5:00:05 AM EDT
[#1]
A long time unless you burn your barrel out doing fa mag dumps.
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Posted: 6/27/2013 10:29:52 AM EDT
[#2]
Here's a test were 10,000 rounds of various ammo was fired through rifles with hard chrome lined bores.
The rifle fired with brass cased ammo had little wear. There are people with twice that much and the barrel is still in good shape. Much depends on what you shoot and how you shoot it: http://www.luckygunner.com/labs/brass-vs-steel-cased-ammo/ |
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Posted: 6/27/2013 12:27:25 PM EDT
[#3]
when the rifle no longer holds the moa you want.
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Posted: 8/9/2013 10:06:35 PM EDT
[#4]
I have 12,275 rounds (as of this afternoons range session) through a beater 14.5" 1:9 bushmaster brl. it will still make my hits on the long shots in 3-gun.
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Posted: 8/10/2013 2:03:34 PM EDT
[#5]
Most likely 346 more rounds fired and your barrel will be toast. 219 rounds if you shoot steel case/bimetal jackets. Truthfully tho, your barrel is likely in the first 1/4 of its life. Unless you abuse it. You may want to add a copper cleaner to your cleaning regimen however. Hoppes 9 is weak and doesn't touch copper. You may notice an accuracy dip once enough copper builds up if only using hoppes to clean. CL bores last a while though.
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Posted: 8/10/2013 2:25:26 PM EDT
[#6]
You've got a long ways to go. But I would upgrade my cleaning solutions like an above poster mentioned. I use KG products, it gets out a lot more gunk.
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Posted: 8/10/2013 8:00:04 PM EDT
[#7]
Fellow above mentioning kg products is spot on. They are great. I personally prefer mpro7 for carbon. boretech eliminator for copper (also does carbon but not as pleasant to handle for just carbon removal). Then I wrap it up with frog lube for lubrication of rifles and slide glide for pistol lube. I have been intrigued by this new product called Rand clp and just ordered some to try on the rifles. All in all this product set makes for a far shorter and FAR more effective cleaning session. Also it's much more pleasant as all these products are non toxic and don't smell. Minus the frog lube which smells fantastic.
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Posted: 8/11/2013 2:23:28 AM EDT
[#8]
Service accuracy for chrome lined bbls is in the 10-20k range. Service accuracy should not be confused with peak accuracy, which will not make 10k.
The above assumes semi-auto only, and not too abusive at that. I have an 11.5" that now has something like 12k+ through it from me, plus who knows how many rounds from the previous owner. It has been used mostly for FA, including some 300-400 rds dumps by sequential mags. First 3" or so of rifling looks about gone, gas port is ratty, and it now does about 12 MOA. Even so, it is not tumbling. A 12 MOA carbine is far from useless. Sam |
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Posted: 8/19/2013 1:27:56 PM EDT
[#9]
Wife was shooting a wore out 14.5" gun this morning. With 1980's surplus ammo it still grouped under 3" at 50-yards (10-shot groups with iron sights). With 12,300 rounds though it's brl and with the original bolt it's still accurate enough for anything but competition. Chrome
Iined brls last a long time. |
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Posted: 8/19/2013 1:30:21 PM EDT
[#10]
Quote HistoryQuoted:
Here's a test were 10,000 rounds of various ammo was fired through rifles with hard chrome lined bores. The rifle fired with brass cased ammo had little wear. There are people with twice that much and the barrel is still in good shape. Much depends on what you shoot and how you shoot it: http://www.luckygunner.com/labs/brass-vs-steel-cased-ammo/ They were cooking the living fuck out of those barrels too. |
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Posted: 8/21/2013 2:03:02 PM EDT
[#11]
FWIW I used the wife's carbine this afternoon to test out some PMC XTAC 55. Ten round groups at 100 yards were under 5". 14.5" brl, iron sights, over 12,350 rounds though it.
Doesn't shoot as well as my new 16" spikes did with the same ammo. But good enough for anything I would used an iron sighted 14.5" carbine for. |
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Posted: 8/27/2013 1:41:05 PM EDT
[#12]
One of the few bits of information that I accept as factual, I grew up with a friend who was involved with fam fireing airmen before they went overseas , They hade M16 A1"s and were fired on simi only and were cleaned after each day of fireing by the range staff. the number of rounds were logged for each weapon. barrels were usually changed at 20 to 24 thousand rounds due to throut erosion.
I was an Oregon national guard high power competitor during the 1980's we normally changed M 14 match barrels at around 3,000 rounds. I don't know for a fact, but I think M 14 service barrels are usually changed at about 10,000 rounds, and once again usually due to throut erosion |
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Posted: 8/27/2013 5:02:15 PM EDT
[#13]
Quote HistoryQuoted:
One of the few bits of information that I accept as factual, I grew up with a friend who was involved with fam fireing airmen before they went overseas , They hade M16 A1"s and were fired on simi only and were cleaned after each day of fireing by the range staff. the number of rounds were logged for each weapon. barrels were usually changed at 20 to 24 thousand rounds due to throut erosion. I was an Oregon national guard high power competitor during the 1980's we normally changed M 14 match barrels at around 3,000 rounds. I don't know for a fact, but I think M 14 service barrels are usually changed at about 10,000 rounds, and once again usually due to throut erosion A lot of that depends on your accuracy standard. The standard those M-14's were held to was much higher than those AF training M-16's. A perfect qualification score with that AF 16 requires a standard of accuracy likely a half order of magnitude less than the one the M-14 required to be competetive. Apples and Oranges. |
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