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Old 05-08-2012, 10:53 PM
lightning dolt
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Barrel seasoning & marinade



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I've read here about barrels getting shot in (broken in?) or seasoned.I understand the process ... shoot it!! But since no two barrels are alike , are there any clues that one's barrel is there? And once there, what are the advantages? With only 400 rnds through mine I'm doubt I'm there yet,but enjoying the journey so far!
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Old 05-08-2012, 11:17 PM
rwphilli
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My opinion is that a 22LR barrel doesn't really need or get "broken in". Most do seem to shoot better after being fouled with whatever particular bullet lube you're shooting. But that mainly applies when you're switching from one brand of ammo to another. When I switch brands, I always fire a few fouling shots before getting serious about groups.
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Old 05-08-2012, 11:38 PM
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There are several things that happen on barrels as they get broken in with a couple hundred, or even thousands of rounds shot through them. Tiny bits of fraze (burrs) that are left on the edges of the lands from machining (both ends) get smoothed out and eventually wore off from the bullet passing over it. This allows the bullet to seal better along the whole ride up the bore and also allows it to exit cleanly from the muzzle. With the carbon, primer, ground glass and other residue left on the bore from previous shots, the bullets perform a very subtle lapping on the bore,

Very small irregularities from cut rifled barrels and to a lesser degree, button rifled barrels also get smoothed out. Lapping at the factory usually takes care of most of it, but not always all of it.

The good thing with the CZ's is that the interior surface of the barrel is extremely smooth and work hardened from the hammer forging process. The break in on these barrels has more to do with cleaning up the tiny burrs at the leade and the crown than it does with the bore. Because tools wear and dull over time, each barrel is somewhat better or worse than another, this is why some folks will see decent improvement after break in, and others don't seem to think it makes a difference.
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Old 05-09-2012, 12:57 PM
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Quote:
Originally Posted by lightning dolt View Post
I've read here about barrels getting shot in (broken in?) or seasoned.I understand the process ... shoot it!! But since no two barrels are alike , are there any clues that one's barrel is there? And once there, what are the advantages? With only 400 rnds through mine I'm doubt I'm there yet,but enjoying the journey so far!
As long as the journey is fun, the rest is not so important. Like all mechanical things, a rifle can come from the factory with minor imperfections in the bore, and every moving part that interacts with another can have imperfections in the surfaces that cause them to operate less smoothly.

If the materials are good and the design and manufacturing are good, then a little "wear" tends to make the function smoother without losing any of the "tightness" in the feel of the rifle.

I find that rimfire bores, shot with one type of ammo, tend to "season" pretty quickly, say in 15-25 rounds.

I have found, however, that some of my CZ rimfires have steadily improved in acccuracy over the first 300-500 rounds through them. Is this truly the rifle getting smoother and the bore more "seasoned?" Or is it that I, as a shooter, and becoming more familiar with the rifle's function and I am a better shooter with it as I gain experience. Every rifle is different, and the more you shoot one rifle, the better you will shoot with it, regardless of the rifle's inherent accuracy. Eventually, a good shooter reaches a rifle and ammo's precision limits.

So, if you find your CZ is shooting better each time out, the answer is that it might be the rifle but I think it's probably you and your confidence and familiarity that are making the big difference.
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Old 05-09-2012, 07:37 PM
mrx
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Better bullet marinade and the brand and batch of ammo your rifle likes makes a difference. But only after you've worked out your technique with that particular rifle.

It's a trial and error thing and paying attention to details, every detail, including what you had for dinner last night and what you had for breakfast, how relaxed the trip to range was, etc.
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