CZ 600 American 308

[Ed-O]

Well my order is placed, was told 4 days for money to be cleared then it will be shipped to local gun store. I plan to put a Burris 2-10x40 on it.  If there are others here that have an American in 308, please share your experiences like what seems to be best ammo, thoughts on glass bedding, refinishing the stock, what to put on the threaded end of the barrel and anything else that other users might like to know about. Hope to hear from many of you.

[Ed-O]

Well went looking for something to thread on the 9/16-24 threads and found Precision Armament. They make an adapter..M4 that is 9/16-24 to 5/8-24 so you can use anything with that thread. I chose to go with their EFAD Hybrid Muzzle Device.  Will post how I like it when I have spent some time at the range with it.

[Ed-O]

FYI  CZ-parts sells a 10 round 308 Mag for the CZ600.

[crosstimbers]

I don't know about the 600 series, but other CZ bolts have had a tendency to be sort of finicky about what scopes the bolt will clear. I'm also not familiar with the scope you mentioned, but if it has a large eyepiece you could end up needing higher mounts.

That's as helpful as I can be, which I realize isn't all that helpful.

[Ed-O]

Went to the range and shot the rifle for the first time. I sighted it in at 100 yards with AAC 150 gr. then tried AAC 168 gr.. The first three shots with the 168, through a very warm barrel was just under 1in. top to bottom and 1/2 in. side to side. I turn 75 this month and am not a regular at the range. I am very much impressed at how well this rifle shoots.
 I asked the range officers how loud they thought the rifle was with the muzzle brake and they did not think that it made any difference than a 308 without one. I also shot my Marlin Lever action 35 Remington and the recoil of the CZ 308 was much much less than the 35 Rem. As this was the first time I have ever shot a 308 I was surprised at how little recoil it had. Would post photos but am not computer savvy enough to understand how to post photos here.
There was plenty of room to work the bolt with the 2-10x40 Burris mounted on medium rings.
 

[Joe L]

That's a great report!  Glad you are liking your .308.  About the muzzle brake, I am not familiar with the one you have, but I can't stand to shoot my Savage 20" .308 with the brake at a public range under a shed.  And no one near me wants any part of it either.  I took it off and just put the thread protector back on.  Everyone is happy.  And I rarely shoot more than 20 rounds per range session with that .308 so recoil isn't too bad anyway. 

Enjoy your fine new rifle.

Joe L

[crosstimbers]

Went to the range and shot the rifle for the first time. I sighted it in at 100 yards with AAC 150 gr. then tried AAC 168 gr.. The first three shots with the 168, through a very warm barrel was just under 1in. top to bottom and 1/2 in. side to side. I turn 75 this month and am not a regular at the range. I am very much impressed at how well this rifle shoots.
 I asked the range officers how loud they thought the rifle was with the muzzle brake and they did not think that it made any difference than a 308 without one. I also shot my Marlin Lever action 35 Remington and the recoil of the CZ 308 was much much less than the 35 Rem. As this was the first time I have ever shot a 308 I was surprised at how little recoil it had. Would post photos but am not computer savvy enough to understand how to post photos here.
There was plenty of room to work the bolt with the 2-10x40 Burris mounted on medium rings.

I'm surprised that the 35 gave you more felt recoil than the .308. Lighter rifle perhaps? I had a 35 several years back, let it go cause I never was able to get good accuracy out of it. Looking back I think I should have tried harder. Glad you're liking the 308.

[Ed-O]

The muzzle brake is from Precisionarmamant.com. It is called the EFAB Hybrid Muzzle Device. The one for 308 has a 5/8x24 thread. to use it on the CZ they sell an adapter 9/16x24 to 5/8x24 that works well. I was told by the range officer that shooting the CZ was no different than any other 308 so I assume the EFAB is working as advertised. They also claim a 45% reduction in recoil and EfAB reduces muzzle flash and can be shot at ground level without blowing up a lot of dust. I know it helps with recoil and had no complaints about noise.   

[crosstimbers]

Yeah it sounds like it has worked. The only rifle I ever shot with a muzzle break was a sniper rifle derived from a Sako action, and the teams on each side of us refused to be next to us after the first session. I could see it blowing debris each way when my partner was firing (prone), so I imagine the side noise was bad too. Glad yours isn't doing that.

Enjoy!

[Ed-O]

Took the rifle to a gunsmith who is also a long range shooter. He took it to a range and shot it and said that CZ designed the 600 American in such a way that it did not need glass bedding but said it needed Pillar bedding and is going to do that. Hope to get it back sometime this week. 

[Ed-O]

Well the gunsmith still has my CZ. He has been trying to figure out why at 100 yards 3 shots can be touching and the next 3 look like a shotgun pattern.
He says it doesn't matter if shots are from a cold barrel, warm or hot the groups are always inconsistent. He is now scoping the inside of the barrel looking for something there that might cause the problem. at this time I'm thinking the barrel is going back to CZ, he said to give him a little more time to figure out just what is causing the problem.  Note gunsmith is a long range shooter, loads his own ammo and has tried various weight bullets that he has used before in his long range guns.

[Ed-O]

Gunsmith took  the CZ to a 1000 yard range and shot the CZ at 600 yards. He installed an adjustable break and his scope on the rifle. He tells me it shot a 4 5/8 in. 10 shot group. I'm hoping to do that well at 300 yards.

[lamelogin]

Did you figure out what the issue(s) were?  Sounds like the muzzle device?

[Ed-O]

Seems that my CZ American 308 likes heavy bullets, 150gr. are all over the target,168gr. are sub moe.