CZ 457 LPR Match Chamber.

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Anyone using the Norma TAC 22 in these match chamber rifles, if so any loading issues? Have you found any ammo that doesn't work well in the rifles, if so what brand or brands? Thanks.
 
I have the MDT version of that rifle (same match chamber). My particular gun doesn't like Tac 22, for 100yds anyway. Having said that 2 other people I know have the same rifle and they get 1" groups at 100 regularly with it. Of course theirs also like CCI SV and mine doesn't. I get good results from Eley Sport and several of the SK ammos. Of course the higher price stuff, CenterX, Tenex, ect. work well also. TC
 
NB Rifles said:
Anyone using the Norma TAC 22 in these match chamber rifles, if so any loading issues? Have you found any ammo that doesn't work well in the rifles, if so what brand or brands? Thanks.
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I shoot cz457 MTR. Same chamber, as far as I know.
I shoot TAC22 for practice and at leisure. Zero feeding or extraction issues. The only ammo of all I've tested over the last two years, was Eley Benchrest Outlaw. I had some issues with cci sv getting stuck in the steel mag and did not feed well
 
Thanks for the reply Guys. I've been a avid centerfire rifle and handgun shooter for several decades, now in my old age and the PMR issues and leaning more towards benchrest .22 rimfires shooting. Have a Savage Mark II and a Browning Bolt Rifle I've been shooting but looking a two higher end .22 rifles, the CZ457 LRP (why am asking about ammo issues with it if any) and the Bergara 14R Three friends shot the Bergara so am in the loop how they shoot and what ammo works best for them.
 
CZ really has their act together producing outstanding barrels. I have ‘several’ and have never been disappointed. Both MTRs do well with Norma and pretty well with any other ammo from mid level to top quality. To me ‘well’ means 1/2” groups at 50 yards 90% of the time. One rifle had an extra IBI barrel that I tested extensively. It was accurate BUT the chamber was tight and short and with some match ammo you needed some downward muscle on the bolt to chamber the round. You were engraving the round into the rifling. Wasn’t worth the effort, I ran with the factory barrel. I added a couple of cases of Norma ammo to my stash just in case. Price was right if I recall, similar to CCI standard velocity. Go for it and play….
 
NB Rifles said:
Anyone using the Norma TAC 22 in these match chamber rifles, if so any loading issues? Have you found any ammo that doesn't work well in the rifles, if so what brand or brands? Thanks.
Click to expand...
So since CZ barrels all comply with the mandatory CIP standards, all their chambers are "match grade" as defined by the voluntary US SAMMI "match" standards. When I put a brand new take off 457 Varmint barrel on my 455 action in an oryx I had trouble closing the bolt on TAC22 and CCI STD. I ended up shimming the barrel out 0.0015 (now it closes just slightly harder with ammo that if dry cycling), that is about perfect.

It shoots both well, but Tac-22 markedly better. Hates Eley sport, match and contact. I have some SK Match to try but have not gotten to the range with it. Others like it, so I have great expectations.
 
Barrels don't have a preference for a particular brand or variety of ammo. When it comes to accuracy performance barrels prefer ammo that is of a good, consistent quality with consistent MVs.

I can't speak to TAC22, but with regard to CCI SV ammo and hard chambering (difficulty closing the bolt) the problem is related to the CCI bullet's design and shape. In 2010 on RFC a shooter posted the following reply from CCI about why CCI SV may be hard to chamber in rifles with CIP chambers.

From: Olin, Brett
Sent: Wednesday, March 24, 2010 10:43 AM
To: cciexpert
Subject: RE: CCI Ammo - Ask the Expert Form

Greg,

The problem is not diameter, it is the length of the driving band on our
bullet.

We make our 22 LRSV ammunition to fit in SAAMI match chambers. The
Anschutz 1712 has a match chamber that is tighter than SAAMI and because
of this the bolt is just short of the closing cam when try to close on
our ammo.

Unfortunately the other ammo you mention will have the same issue.

Our sister company Federal Premium Ammunition makes target grade ammo,
part # UM22 and 922A that may be easier to chamber in your rifle.

Hope this helps,

Brett Olin
CCI/Speer/ATK

(It's worth noting that the Anschutz 1712 referred to in the explanation above has a CIP chamber.)

See post #4 here https://www.rimfirecentral.com/thre...5358&nested_view=1&sortby=oldest#post-2865358
 
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