Barrel Break In for 527 in .223

[eoats]

Didn't find much on a search and am wondering what the recommended practice?

Classic was shoot one round clean, shoot 1 & clean for 5 more. Then do 3 round groups & clean after each for 5 cycles. After that 5 rounds & clean for 5 cycles, so that after 45 to 50 rounds you're there. This is kinda what I did on my 30-06 Vanguard.

You guys doing like that with your CZ's?

[Wahoo1 again]

I normally shoot 3 rounds, pull a bore snake with a drop or two of Breakfree on the brushes through and let cool to ambient temperature. Repeat the cycle about 10 times and call it good. I also do the same thing when working up hunting loads. I want to find a load that's consistent from a cold barrel and then a follow up shot or two.

[eoats]

Thanks Wahoo,  I did about the same with my Weatherby trying to zero the scope & and break it in all at the same time.
Looking back wondering if I rushed it and so it took a long time to get the sub MOA I wanted. It was about 200 rounds until I got under 2" group at 200 yards.

So finally found this on the CZ USA website:

"Q: ?Why are CZ rifles so accurate??

A: CZ rifles produced at our factory in the Czech Republic feature cold hammer forged barrels. Massive rotary hammers reshape the steel around a hardened mandrel that runs down the inside of the barrel, leaving its reverse image imprinted in the bore ? the lands and grooves of rifling.

Hydraulically lapped at the factory, our barrels need no ?break-in.? Any burrs or irregularities that might catch the bullet jacket and create copper fowling have already been polished away by the time the barrel is fit to the rifle.

The resulting barrels have built a reputation for accuracy, from the 455 rimfire platform to the Ultimate Hunting Rifle."

http://cz-usa.com/support/faq/

[bluzman]

Didn't find much on a search and am wondering what the recommended practice?

Classic was shoot one round clean, shoot 1 & clean for 5 more. Then do 3 round groups & clean after each for 5 cycles. After that 5 rounds & clean for 5 cycles, so that after 45 to 50 rounds you're there. This is kinda what I did on my 30-06 Vanguard.

You guys doing like that with your CZ's?

When I got my 527 Carbine, I cleaned as I do with every newly acquired firearm. Then, as soon as the opportunity arose, I took it to the range, put about 50 rds through it and followed that up with a second cleaning - shoot, clean, repeat.

[2bytandem]

They are factory lapped. Clean it, shoot it, enjoy it!


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