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Posted: 12/11/2001 7:45:09 AM EDT
I've finally got my AR-10 assembled with the KAC M5 RAS, Armalite NM trigger, ARMS #22 Rings and B&L Elite 4200 4-16x50mm scope, KAC bipod addapter & Harris Bipod. I am only lacking my flip up back up irons to complete this project!.... Detals and pictures can be found at www.ar15.com/forums/topic.html?id=77226

Now I am trying to choose a fairly decent CHEAP ammo to use to break in the barrel and plink plus some better ammo for serious shooting down the road.

I am leaning towards the American Eagle 308 ammo for break in and plinking but I haven't been able to find it! I am also looking at the Federal Gold Medal Match but I am not sure which load to buy. I thought that the 168-gr load is most popular... is this correct?

Link Posted: 12/11/2001 7:52:20 AM EDT
168 grn and 175 grn.
Has your barrel been broken in ?
Link Posted: 12/11/2001 7:55:41 AM EDT
Nope... not a single round has been fired through her yet! That is why I assume it would pay to break her in with cheaper ammo.

Also, this is an Eagle Arms upper/barrel so it is not chrome linned. Therefore she will need cleaning and attention during the break in period!
Link Posted: 12/11/2001 7:57:40 AM EDT
For CHEAP but very accurate ammo, I really like the Portugese surplus .308 It is awesome from my FAL.

Available in 200 round battlepacks from Sportmansguide, Ammoman, Lippy, etc..
Link Posted: 12/11/2001 8:02:38 AM EDT
Q. Bore, you might head over to the ArmaLite site as I believe you need to break in this barrel with moly bullets. (You might also give ArmaLite Technical a call. Generally pretty helpful folks.)

Any idea where to get another M5 RAS and how much ?
Link Posted: 12/11/2001 8:37:00 AM EDT
[Last Edit: 12/11/2001 8:31:35 AM EDT by Quarterbore]

Originally Posted By 5subslr5:
Q. Bore, you might head over to the ArmaLite site as I believe you need to break in this barrel with moly bullets. (You might also give ArmaLite Technical a call. Generally pretty helpful folks.)

You seem to be right as that is what the directions which follow indicate. This doesn't make any sence to me as a Molly bullet is designed to reduce the friction between the bullet and the bore. If I am trying to lapp my barrel, why would I want less work done? It seems to me using molly bullets will only prolong the period it takes to break in the barrel.

As for the RAS, there are many people selling them on these forums. I bought mine from JT Surplus but that doesn't mean they have the best prices.

So, anybody have an oppinion about Molly vs. non-Molly bullets for break in?


January 28, 2000

Breaking in Match Barrels

To instruct purchasers of ArmaLite match rifles of proper break in procedures.

All new rifle barrels suffer from internal machine marks that can scratch passing bullets. Bullet jacket metal can foul the pores of the new barrel. Leading competitive shooters believe that breaking their barrels in properly can lead to better accuracy and longer life.

ArmaLite Match Rifle barrels are produced from a custom, target grade blank. For optimum accuracy and improved life expectancy, it MUST be properly broken in. We recommend the following procedure:

Remove any existing copper fouling from the barrel by using a high-quality copper-removing solvent like Hoppe’s No. 9.

Fire 11 single shots, each followed by about 20 strokes of a tight fitting patch bearing J-B bore cleaner (available from Brownells, 515-623-5401). Use a Parker Hale or other wrap-around style jag rather than a slotted jag. From 12 to 30 shots, clean after each 3 shots. From 31 to 50 shots, clean after each 5 shots. Clean thoroughly with a high quality bore cleaner every 10 shots until 100 shots. This time-consuming process will allow the barrel to smooth out without an accumulation of copper fouling in the pores of the steel. The barrel should thereafter be cleaned every 20 rounds for best match accuracy. Accuracy continues to improve for several hundred rounds as the rifle breaks in.

ArmaLite recommends the use of Black Hills moly coated .223 Win Match ammunition for both break-in and competition. We believe that Black Hills moly coated ammunition reduces the break in period by half and lengthens the period between cleaning in matches. ArmaLite stocks Black Hills brand ammunition.



Link Posted: 12/11/2001 9:11:12 AM EDT
I'm not big into name dropping but I know the ArmaLite president, Mark Westrom, and he says this is the way to go.
He's also a retired Lt. Colonel - Army.

It is good that you've not fired your weapon as at least you have a choice as to how to proceed.

I believe there's an AR-10 section on this board and ArmaLite personnel are the MODs. You might also check there.
Link Posted: 12/11/2001 10:20:00 AM EDT

I haven't tried them (yet), but you might look into David Tubb's Final Finish system. It's a bunch of bullets coated with a light abrasive in various grits. You just fire them through the barrel, and they polish the bore - no cleaning after every round!

Here's a link to a review:


If you're not a reloader, here's a link to a place that sells loaded rounds with these bullets:


Like I said, I've no personal experience with this product, but it sounds interesting. So much so, that I'm going to try it when I get my M4gery complete...

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