CZ 17 Hornet Varmint: Gunsmith says to support barrel for accuracy - Page 2 - RimfireCentral.com Forums

Go Back   RimfireCentral.com Forums > >

Notices

Join Team RFC to remove these ads.
Reply
 
Thread Tools Display Modes
  #16  
Old 04-22-2019, 09:07 PM
Jgrizz

Join Date: 
Feb 2019
Posts: 
89
TPC Rating: 
0% (0)


Log in to see fewer ads
Also what B23 is saying. Factory ammo isn’t always the best. Some guns shoot it better than others. And different lots of ammo will also shoot differently. I still think that gun should shoot better than that right out of the box.

If you have taken the gun apart or done anything to it, I would make sure everything is reassembled back to factory specs,
Reply With Quote
  #17  
Old 05-01-2019, 09:03 AM
cowboy4
NRA Member - Click Here To Join!

Join Date: 
Jun 2003
Location: 
Kentucky
Posts: 
2,970
TPC Rating: 
100% (6)
Quote:
Originally Posted by carbonbased View Post
What say you? I thought sporter barrels often merit such support, but not varmint barrels. Although CZ 527 varmint barrels are not real heavy…
A quality, correctly and concentrically fitted barrel should not need the dampening effect of a pressure pad. That said some rifles whose groups are best described as “patterns” rather than groups will do better when dampened. I agree that sounds like a harmonic issue, the source of which might be the bedding of the receiver (allowing movement), the quality of the barrel’s steel, the bore’s path, or a combination of these and perhaps more factors.
Before I spent much on “fixing” anything I’d vet every component/factor:
scope/mounts, bore cleanliness/coppering condition, receiver bedding/screw torque, ammo quality (handloads), bag/rest set up, and (no offense) your technique on the bench.
None of the above cost much. Once they’ve been eliminated as possible source of your inaccuracy then it’s much more palatable to accept permanent changes to your rifle. If it were me and some pressure supplied by a few layers of business cards (near the tip of the fore end) doesn’t help, I would be much more inclined to look at a major change, ie...sell, trade, or rebarrel.

Good luck.

Last edited by cowboy4; 05-01-2019 at 09:06 AM.
Reply With Quote
  #18  
Old 05-01-2019, 09:17 AM
flangster

Join Date: 
Feb 2013
Posts: 
4,776
TPC Rating: 
100% (34)
I had my CZ 527 in .17 Hornet out at the range yesterday. I had replied above saying that my first groups were horrible, and they were. But it turned out, in my case, to be a scope/ring problem. I swapped the scope and yesterday did this with Hornady 20 grain factory ammo at 100 yards:



The barrel is free floated to the action on this rifle. My "bad" groups were like the ones you reported. The above target doesn't "prove" anything with respect to your rifle, of course. But I was glad that I took another look at the scope issue before sending it back to CZ.

BTW: I think your rifle might be outside CZ's own accuracy standard. I had a .222 like that that had some gaps in the chamber metal and was shooting at over 2 inches at 100. I sent it back to CZ-USA and they replaced it with a rifle that can actually do well. Have you called them yet?

By "torque test" above I meant the action screws. You can go up in 5 inch/lb increments and see what the effect is on your groups.
__________________
============
n00by is now flangster on RFC -- still a newbie though
Reply With Quote
Sponsored Links
Advertisement
 
  #19  
Old 05-01-2019, 09:50 AM
carbonbased
NRA Member - Click Here To Join!

Join Date: 
May 2018
Posts: 
85
TPC Rating: 
100% (2)
Well, I think the gunsmith is on to something, maybe it’s a crutch, heck I don’t know. The bottom two groups are warm-ups, and the top one my friend was trying. I don’t like the idea of he pad, but…
Attached Images
File Type: jpg ED2F340D-3DCD-4F8A-9D33-26ABC4FE1A13_1556722125484.jpg (276.9 KB, 24 views)
Reply With Quote
  #20  
Old 05-01-2019, 10:21 AM
flangster

Join Date: 
Feb 2013
Posts: 
4,776
TPC Rating: 
100% (34)
Better! That three shot group labeled "Mike" is how I wish I shot all day long.

You know, my first centerfire rifle was a CZ 527 in .223 and it didn't start coming into its own until I had a certain number of rounds down the barrel. With a round count around a thousand now, the barrel looks like it was lapped.

[Lifting a glass of imaginary beverage] . . . here's to many more small groups.
__________________
============
n00by is now flangster on RFC -- still a newbie though
Reply With Quote
  #21  
Old 01-04-2020, 12:50 PM
AubMassCoyote

Join Date: 
Dec 2019
Posts: 
175
TPC Rating: 
0% (0)
I know, free float them, then reattach them. This is all dreamed up by people looking to get your money.
Reply With Quote
  #22  
Old 01-05-2020, 12:00 AM
idahoron

Join Date: 
Mar 2019
Posts: 
163
TPC Rating: 
0% (0)
I recently started to shoot my 527 varmint 17HH with a factory threaded barrel. I sighted it in with hornady 20 gr factory rounds. It was shooting between 1 and 2". Then I started shooting reloads. 12 gr of 1680 with hornady 20 gr bullets were .5" 12.2 gr went to .56" 12.4 went .7" the faster It went the bigger the group's got. My next secession I am going to reduce loads a bit and test them.
The biggest issue with group testing is wind. Southern Idaho has wind every day.
Reply With Quote
  #23  
Old 01-07-2020, 05:19 AM
56S

Join Date: 
May 2012
Posts: 
1,300
TPC Rating: 
0% (0)
Give the bore a good clean and repeat the test using the same ladder steps but this time start at the 12.4 and come down.
I chased my tail when I first got my 527A. There appeared to be no rhyme or reason until I considered how few shots it took before precision dropped off. I'm seeing more copper than I expected and considering trying to re break the barrel in to see if I can get a layer of carbon between the steel and that screaming little pill of destruction.
Reply With Quote
  #24  
Old 08-02-2020, 02:17 PM
carbonbased
NRA Member - Click Here To Join!

Join Date: 
May 2018
Posts: 
85
TPC Rating: 
100% (2)
Well, I wasn’t happy with the barrel support solution, so my shop sent the gun back to CZ. We’ll see what happens.
Reply With Quote
Reply

Thread Tools
Display Modes

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off


Similar Threads
Thread Thread Starter Forum Replies Last Post
Mossberg 42MB/(a) SN survey sakorick Mossberg 92 06-26-2020 04:56 PM
Switch Barrel Savage MKII/93!!! BLUElixir Savage/Stevens 48 12-27-2019 07:32 AM
Barrel Seasoning EddieE CZ / Brno 22 05-26-2018 08:20 PM
LOOOOONG barrel 2mene22s 10/22 Barrels - Factory & Aftermarket 9 09-08-2017 07:18 AM
Exterior Ballistics -- A Primer Sophia Open Rimfire 34 12-31-2007 07:44 AM



All times are GMT -5. The time now is 04:53 AM.

Privacy Policy

DMCA Notice

Powered by vBulletin
Copyright ©2000 - 2020, Jelsoft Enterprises Ltd.
Search Engine Optimisation provided by DragonByte SEO (Lite) - vBulletin Mods & Addons Copyright © 2020 DragonByte Technologies Ltd.
vBulletin Security provided by vBSecurity v2.2.2 (Pro) - vBulletin Mods & Addons Copyright © 2020 DragonByte Technologies Ltd.
vBulletin Optimisation provided by vB Optimise (Pro) - vBulletin Mods & Addons Copyright © 2020 DragonByte Technologies Ltd.
Copyright ©2000-2018 RimfireCentral.com
x