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CZ 527 7.62 x 39mm barrel heat

237 Views 10 Replies 5 Participants Last post by  sharps4590
I have a CZ527 chambered in 7.62 x 39mm with a five-round magazine. It is an excellent rifle but the barrel heats up with about ten rounds fired through it.

I contacted CZUSA by email and asked the below four questions.
1. Is it normal for the CZ 527 barrel to heat up quickly?
2. What causes this barrel to heat up quicker than other rifles in the same class?
3. Will this heat cause harm to the barrel?

4. Are replacement barrels available that will stay cooler?

They answered #4 (basically said no) but I have tried three times to get them to answer questions 1 thru 3. Rather than wait any longer for CZ-USA to respond, I thought I would reach out to you all for some advice on barrel heat especially as it relates to the CZ 527.

Thanks always.
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The 527 is not a target rifle nor is it a combat rifle. It is a fine short to medium range hunting rifle. It is pretty light that is to be carried in the field more than shot. 10 rounds before she starts to wonder (assuming that is the issue) is pretty good for such a rifle IMHO.
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I don't think that I have ever fired any rifle that didn't get hot with 10 rounds fired.
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I don't think that I have ever fired any rifle that didn't get hot with 10 rounds fired.
Ya I thought the group must be opening up otherwise whats the concern. :unsure:
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You guys always know exactly what the issue is, which is why I am glad to have joined this forum. Yes, after the barrel heats up, the point of impact opens up. It has become so predictable that I just adjust 2"-3" after ten shots or give the rifle a rest and let it cool down. I know it is not a target rifle, but it is so enjoyable to shoot. It is hard to resist that one more mag load. I guess I can relax and know it is not unusual for the barrel to heat up after ten rounds. Thanks all.
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It's perfectly normal for 10 rounds to do that . When testing loads you have to wait for barrels to cool . The thing to do is bring a couple other guns to shoot , let the hot ones cool (bolt open and a small fan helps) and shoot the cool ones !

Never pass up a good excuse to buy / shoot another gun ... Honey , I have to buy another gun so I can rotate while shooting / cooling ...she'll believe that !
Gary
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That's uhhh....quite a few rounds in a hunting weight barrel. For decades the standard for groups was 5 shots. I got away from 5 and went to 3 years ago. It is enticing to keep shooting but, nothing is gained and heat and barrel life do not go hand in hand.

Edit: Several years ago I was checking a "new to me" drilling and wanted to wring out the last ounce of accuracy. No, 3 barrels isn't the same as 1 but, heat still has its effect. It was summer time and I had been mowing a part of our yard and had left the mower out as I wasn't near finished. Rather than wait around for the barrel to cool completely, after I fired a round I'd get on the mower and mow for a while. I averaged about 20 minutes between shots. My bench is in the shade and the barrel had cooled to ambient temperature by then and I'd fire another round. 3 shots took about an hour BUT, I was rewarded with basically a one hole group at 50 yards, open sights, benched and bagged. The same drilling, when not allowed to cool completely would start walking on the 3rd shot. Most drillings I've had do.
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That's uhhh....quite a few rounds in a hunting weight barrel. For decades the standard for groups was 5 shots. I got away from 5 and went to 3 years ago. It is enticing to keep shooting but, nothing is gained and heat and barrel life do not go hand in hand.

Edit: Several years ago I was checking a "new to me" drilling and wanted to wring out the last ounce of accuracy. No, 3 barrels isn't the same as 1 but, heat still has its effect. It was summer time and I had been mowing a part of our yard and had left the mower out as I wasn't near finished. Rather than wait around for the barrel to cool completely, after I fired a round I'd get on the mower and mow for a while. I averaged about 20 minutes between shots. My bench is in the shade and the barrel had cooled to ambient temperature by then and I'd fire another round. 3 shots took about an hour BUT, I was rewarded with basically a one hole group at 50 yards, open sights, benched and bagged. The same drilling, when not allowed to cool completely would start walking on the 3rd shot. Most drillings I've had do.
I don't shoot the CZ very often but it is pretty accurate. I am afraid I might have over worked it. Glad I asked you all.
What I will do now is shoot only a few rounds through it, but take it to the range more often and shoot it cold. I'll bring other guns along with it or I will take gwpercle's advice and buy a gun for rotation purposes. I will tell my wife it is necessary like crop rotation so I have no choice. Wish me luck.
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Guys, I am seriously considering a rotational rifle in 7.62 x 39mm. For the fun of looking, I started with AKs but I shoot for accuracy not power and I need optics at my age. Then went to an AK variant like the Galil Ace Gen II. $1800 Yikes!!! Decided to look at AR styles chambered in 7.62 x 39mm. CMMG Resolute Mk47 was rate #1. $1800 Yikes again!!! PSA has the KS-47 Gen2 which is an interesting AR/AK hybrid. It is affordable at around $740 but does have some questionable build issues like an AR bolt that is reamed for 7.62 x 39mm and reviews say it has some ejection issues. But as I said with the AK, I shoot for accuracy and not power. I mentioned to my wife the idea of buying an AK style rifle as a rotational gun. After looking at me sideways, she said "Why can't you just rotate one of your other guns in another caliber?" Of course that made way too much sense so I came up with the only answer I could muster at the moment. I looked at her and said with unwavering confidence, "The guys at Firearms Forum said I needed to buy a rotational gun." She knows me too well and reminded me from behind a locked door, "I thought you don't want an AR-15 rifle (I didn't dare correct her by saying "You mean AK") because you said you don't enjoy wasting ammo with automatic rifles?" (Again, I didn't dare correct her by saying "You mean semi-automatic". Besides she probably is ignoring me anyway behind that locked door.)...Of course, she is right as usual. So here I am, hours later, rethinking the whole rotational thing. HMMMMM...(There is now one of those cartoon clouds above me) "I enjoy target shooting for accuracy, and I do enjoy the 7.62 x 39mm but I don't want to wear down my CZ527. Also, I am pretty cheap. "Hey dummy" , said I to myself. "Why don't you go with another bolt action rifle?" Ruger makes an American Ranch in 7.62 x39 and I do like my Ruger Ranch in 5.56NATO. Just before my wife was falling asleep, I said "What would you think of another Ruger Ranch bolt action rifle except in 7.62x 39mm? It's only around $500." She said, "That sounds like a good idea. Go for it." It does sound like a good idea. That is why we have been happily married for 33years. (If you are going to talk to your wife about buying guns, do it when she is nearly asleep). Short story long, any of you have experience with the Ruger Ranch in 7.62 x 39mm?
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Cheap accurate fun........ :unsure: something to go with your 527? A 457 or course, you'll have a blast:cool:
Ahhhhh....how the human mind can justify whatever it is that needs justifyin'.......:devilish:
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