Gilberts1989 Posted April 13, 2014 Report Share Posted April 13, 2014 I am just about to pick up a cz 455 in .17. I was wondering if you have to break the barrel in like with a center fire. I can't find anything on it with a goole search. Cheers Quote Link to comment Share on other sites More sharing options...
babs2020 Posted April 13, 2014 Report Share Posted April 13, 2014 some one told me it take s about a 100 rounds not sure if this is true as my 17 was s/hand Quote Link to comment Share on other sites More sharing options...
BSA-airgunner Posted April 13, 2014 Report Share Posted April 13, 2014 All I done on mine from new was 50 yard target after about 25 rounds the group tightened up ....worked it out to 100 and never looked back... Quote Link to comment Share on other sites More sharing options...
telf Posted April 14, 2014 Report Share Posted April 14, 2014 when i had mine took it out the box and started shooting and that was that,imo you should clean it after every outing,but thats a different ball game alltogether Quote Link to comment Share on other sites More sharing options...
kent Posted April 14, 2014 Report Share Posted April 14, 2014 Whatever you do make sure you clean it well before the first shot you fire Personally a believe in the one shot clean for the first few rounds as it removes tiny edges that cannot be gotten to in general machining practices, cant prove it as no two barrels are alike but it works for me Quote Link to comment Share on other sites More sharing options...
matone Posted April 14, 2014 Report Share Posted April 14, 2014 As Kent says,clean after each shot for a few rounds, then you`ve given the barrel the best chance that you can ! Enjoy your new piece ! Quote Link to comment Share on other sites More sharing options...
snipers eye Posted April 14, 2014 Report Share Posted April 14, 2014 when i had mine took it out the box and started shooting and that was that,imo you should clean it after every outing,but thats a different ball game alltogether +1 same here,just took it out and shot it,groups under 1" from day one,i clean with a patch worm, Quote Link to comment Share on other sites More sharing options...
dadioles Posted April 14, 2014 Report Share Posted April 14, 2014 Same as Kent. Do make sure that you clean it thoroughly before you take the first shot. There is protective grease and all sorts of other muck in the barrel when new. It will take quite a few shots to 'polish' the inside of the barrel and care taken now will be worth it. You will also find that the bolt action becomes smoother with use. Its all common sense really. Quote Link to comment Share on other sites More sharing options...
1in9 Posted April 28, 2014 Report Share Posted April 28, 2014 The pressures in a .17HMR barrel aren't in the same league as centrefire so shoot and polish routines might take a looong time. I'm down with Varmint Al on rimfire barrels, a light bore polish with Bore paste or KG2 to clear out the factory grease, rough machined edges edges and lightly polish the bore should be fine. Did this with my CZ 452 Varmint out of the box and it was giving me 5p groups at 100yds on my local indoor range. The Varmint Al page in question is here http://varmintal.com/ashot.htm scroll down about a third of the way down. Quote Link to comment Share on other sites More sharing options...
LeadWasp Posted April 28, 2014 Report Share Posted April 28, 2014 Whatever you do make sure you clean it well before the first shot you fire Personally a believe in the one shot clean for the first few rounds as it removes tiny edges that cannot be gotten to in general machining practices, cant prove it as no two barrels are alike but it works for me +1 You'll be amazed at the **** that comes out of a new barrel from manufacture. Cleaning after each of the first say 10 rounds can at the very least do no harm. Quote Link to comment Share on other sites More sharing options...
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