CZ 527 Varmint Barrel Break In

There is no best way. And I'm not going to offer an opinion since my way will be different then everyone else's. Do search and you'll find that some people say take it out shoot it and it's broken in, others say shoot one shot and clean it, until you notice copper fouling is next to none.

I believe the answer lies some place in the middle.
 
This is an easy one for the search feature use "barrel break in" You will get more reading than you can stand.

These are just a few that come up, there are tons more. We really like to talk about this!!! Its about the most controversial subject out there.
http://www.predatormastersforums.com/ubb...ue#Post52976182
http://www.predatormastersforums.com/ubb...part=1&vc=1
http://www.predatormastersforums.com/ubb...ue#Post52756010

Heres one with alittle input from yours truly!
http://www.predatormastersforums.com/ubb...part=1&vc=1
 
I talked to Bo Clerke who owns Clerke arms, and he says the theory of barrel break in is bologna. Mr. Clerke has forgot more about guns than must of us will ever know. He is a pioneer in the gun business.
Just don't go shoot up the country side. Shoot a few shots and check your grouping, let your barrel cool off and shoot some more, then clean it. Most rifles shoot better when dirty anyway. Tell me that everyone shoots a clean barrel during competition or on the battlefield. If you want I can quote you the magazine that Mr. Clerke says the same thing in it. I never did the "barrel break in" with mine and with factory ammo I can shoot a quarter size group at a 100yds. Not the best but mind you I am not shooting the best scope in the world. Just set at 4x on a ballistic plex scope, not some 700.00 dollar scope.
 
shoot clean shoot clean, how many shots? depends who you ask. Personally i take some JB bore polish and clean it out and shine up the bore. Anyway, that particular gun will be a tack driver outta the box.
 
Quote:
shoot clean shoot clean, how many shots? depends who you ask. Personally i take some JB bore polish and clean it out and shine up the bore. Anyway, that particular gun will be a tack driver outta the box.



I have a 112 Savage in .223 that was an OK shooter out of the box. It would shoot 1/2" groups on occasion, but not all the time. I read an article about JB bore cleaner and how to polish the bore of guns that perhaps are a bit factory rough. Well, I bought some and tried it and hey! Guess what? Next time to the range I suddenly started shooting 1/4" to 1/2" groups all the time! Same ammo as before. Well, that made a believer out of me. Anytime now that I get a new gun I hit the bore a few licks (OK, a couple dozen passes) with JB then start working up a load.

I have no varmint rigs that will not shoot under a half inch. Not going to say that JB is the reason, but I will say that I think that it is at least part of it.
 
Do what you want, but the CZs come lapped from the factory and are a drop forged barrel, which I think helps explain their great accuracy in very short time.
 
Thank's for the link's Furhunter..Good reading there /ubbthreads/images/graemlins/grinning-smiley-003.gif

I also use the same method as Furhunter,One thing i'd suggest as was mentioned in some of those threads/link's is to use a bore guide & good cleaning rod like a Dewey.
 
From what I understand CZ's have a pretty smooth barrel from the get go. I'm seriously considering buying one. If that M1 527 ever becomes available in 204 I'll snatch it up immediately. Dave
 
I don't reload, so I'm shooting the Hornaday 32 and 40 grain bullets. It was so cold yesterday evening, I didn't get any group data. I'll fine tune it in a few days when things warm up!
 
Quote:
Quote:
shoot clean shoot clean, how many shots? depends who you ask. Personally i take some JB bore polish and clean it out and shine up the bore. Anyway, that particular gun will be a tack driver outta the box.



I have a 112 Savage in .223 that was an OK shooter out of the box. It would shoot 1/2" groups on occasion, but not all the time. I read an article about JB bore cleaner and how to polish the bore of guns that perhaps are a bit factory rough. Well, I bought some and tried it and hey! Guess what? Next time to the range I suddenly started shooting 1/4" to 1/2" groups all the time! Same ammo as before. Well, that made a believer out of me. Anytime now that I get a new gun I hit the bore a few licks (OK, a couple dozen passes) with JB then start working up a load.

I have no varmint rigs that will not shoot under a half inch. Not going to say that JB is the reason, but I will say that I think that it is at least part of it.



Good posting.
You're experience mirrors mine. Now, I do a JB Bore Paste scrub of all barrels that aren't lapped by the barrel maker.
Barrels like Hart, Shilen, Krieger, and other aftermarket barrel makers like them lap their barrels before selling them; they don't need a JB Bore Paste scrub. You just shoot them as the bore of those barrels are as good as they will ever be when purchased. Factory barrels are different from these in that they are NOT lapped before you get them. And they retain the rough tool marks form the machining process. Doing the JB job on these barrels makes them equal to the high priced custom barrels, and shoot equally to them. When people refer to breaking in a barrel, what they are referring to is the smoothing out of the tool marks from the machining process. This includes the leade area ahead of the chamber, which has tool marks from the chambering operation.
 
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