CZ 527 Varmint ammo question

[AZ Heat]

I've got a CZ 527 Varmint rifle and was wondering if the Lake City 223/5.56 ammo is good ammo for target shooting? I have heard mixed comments on using 5.56 ammo in a 223, but I thought I'd ask specifically for this gun and this ammo.

 

[RNB65]

Contact CZ USA and ask them if ammo marked 5.56mm can be fired in the 527. They'll give you the definitive answer.

http://www.cz-usa.com/about_contacts.php
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[AZ Heat]

Thanks...I'd already e-mailed them and just haven't received a reply. I'll post their reply here for others' future reference.

 

[AZ Heat]

I finally got a reply from CZ:

"M193 55 gr ammo should be OK."

That is all they said in the reply...

 

[RNB65]

Sounds good. I pretty sure CZ builds all their guns to work with milspec ammo.
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[Beagle-zebub]

Wait a second, if it has a .223 chamber, it shouldn't be firing 5.56 NATO. If this practice were generally OK, there would be no market for the Wylde chamber; if CZ chambers had 5.56 tolerances, it would be darn weird for a Varmint gun, and would possibly effect accuracy, in addition to the hazards involved. Commercial .223 is certainly okay in a 5.56 NATO chamber, but supposedly not vice versa--the relationship is reversed in the case of .308 and 7.62 NATO. Customer service might think it's okay, but they, like the guys behind the counter, can't always be trusted to know what is and isn't safe.

Then again, though, you should probably take the word of someone in the reloading forum instead of mine.

Have fun with that rifle, by the way!