It's a 16mm dovetail. USO has made a few CZ to Picatinny adapters for the CZ-527, and IIRC Kalinka has a big clunky thing. It would probably be easiest to just have you gunsmith drill and tap the top of the rail and put an extended Weaver rail on.
Ordered a CZ 527 Carbine in 7.62X39MM
- Thread starter George Hill
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Mannlicher
Member
7.62X39 is about like a 30-30. No need for a high power scope. 4X would do fine, any good brand, but not an el cheapo.
The CZ will make a fine little close cover rifle.
The CZ will make a fine little close cover rifle.
TOU
Member
WOW! I thought one of the reasons they developed the 6.5 was to essentially get the performance equal to a 7.62x39 but make it feed easier in the straight magazines of the AR/M-16's ect. (The x39 works most reliably in a rounded "banana" type magazine due to the shape of the bullet and case.) But...in the CZ 527 magazine design and 5 shot capacity it is not an issue. So...why? Of course wild catting a x42 mm might prove interesting. Keep me posted on this.
Couldn't agree more...it is of my all time favorite designs. (Of course it's a clone of the Brno Fox II though)
Cool..I'm glad you kept your Kevlar CZ .223 and have since added a Hornet. Please remind me the difference in the Hornets and the K Hornets. Since CZ doesn't make it in K Hornet, what was involved in getting it to take the K. (Please excuse my ignorance.)
I really like my Walnut .204 as well but thought it best to keep one of these around as well. Very excited about it! (Now just have to find the right CZ Carbine in .223
)Cheers,
TOU
jerkface11
Member
I had a gunsmith make this one for my 527.
P. Plainsman
Member
Good thread. These seem like cool little carbines (and I'm not even into bolt rifles).
Old school gun savant Paco Kelly got one and liked it lots:
http://www.gunblast.com/Paco_CZ527.htm
Old school gun savant Paco Kelly got one and liked it lots:
http://www.gunblast.com/Paco_CZ527.htm
Ballistically, 6.5 Grendel or even my poor attempt are far superior to 7.62x39. It's the result of more case capacity and bullets with better BC. The 7.62x39 has 35gns of water capacity, as does the grendel, and mine has 39.5 gn capacity. The PMax for 7.62x39 is a modest 51,500 PSI, while grendel and mine are 58,700 PSI
By 100 yards the 6.5 is rapidly pulling away from the 7.62, with more velocity and less drop.
Assuming the same 18inch barrel, at the muzzle
The 7.62x39 with 125gn Sierra SP is going 2440, BC 0.274
6.5 Grendel with 123gn Sierra is going 2425 fps, BC 0.510
6.5x42 with a 123gn Sierra is going 2611 fps, BC 0.510
here's the numbers for 100 yards
7.62x39 2138fps, 1268 ft.lbs, drop 3.2 inches
6.5 grendel 2261fps, 1396ft-lbs, drop 3.1 inches
6.5x42 2440, 1626ft-lbs, drop 2.7 inches
At 200 yards
7.62x39 1859fps, 960 ft-lbs, drop 14.0 inches
6.5 Grendel 2103, 1208, 13
6.5x42 2275, 1414, 11.2
at 300
7.62x39 1606, 715, 35
6.5 Grendel 1952, 1040, 30.8
6.5x42 2117, 1224, 26.4 inches
At 400
7.62x39 1386, 533, 69.6
6.5 Grendel 1807, 892, 57.7
6.5x42 1965, 1064, 49.4
By 100 yards the 6.5 is rapidly pulling away from the 7.62, with more velocity and less drop.
Assuming the same 18inch barrel, at the muzzle
The 7.62x39 with 125gn Sierra SP is going 2440, BC 0.274
6.5 Grendel with 123gn Sierra is going 2425 fps, BC 0.510
6.5x42 with a 123gn Sierra is going 2611 fps, BC 0.510
here's the numbers for 100 yards
7.62x39 2138fps, 1268 ft.lbs, drop 3.2 inches
6.5 grendel 2261fps, 1396ft-lbs, drop 3.1 inches
6.5x42 2440, 1626ft-lbs, drop 2.7 inches
At 200 yards
7.62x39 1859fps, 960 ft-lbs, drop 14.0 inches
6.5 Grendel 2103, 1208, 13
6.5x42 2275, 1414, 11.2
at 300
7.62x39 1606, 715, 35
6.5 Grendel 1952, 1040, 30.8
6.5x42 2117, 1224, 26.4 inches
At 400
7.62x39 1386, 533, 69.6
6.5 Grendel 1807, 892, 57.7
6.5x42 1965, 1064, 49.4
R.W.Dale
Member
I'm shooting the Nosler ballistic tip at that same velocity with it's much better .366 BC
For this bullet energy at 200yds is 1134 and at 300 you still have 924 ft lbs
That isn't much more than 100 ft lbs from the vaunted 6.5 grendel at 300 yds a range that in my opinion is where you grab a rifle chambered for a much more potent cartridge than will fit in a mini mauser
What ZERO are your trajectory figures based from?
jerkface11
Member
GunTech I believe he quoted me a price of $150 or so if someone else wanted one. It's Bullseye Precision in Fort Smith Arkansas phone # 479-785-3500
woof
Member
Guntech, What is the model of the Burris 4x scope on the carbine you sold and, is it a current model? Might be what I would put on mine. Thanks
stubbicatt
Member
I simply modified my bolt handle with a Dremel, and had the gunsmith reblue it. I use medium Warne rings, and a 3-9x scope. This is on a 223, but the actions are the same, only the bolt face/extractor claw are different.
It is one of the old "Lux" models. There are straight comb stock models available now, but this rifle is a tack driver and light and easy to carry. I don't know anybody who owns one of these CZ rifles who doesn't like it.
It is one of the old "Lux" models. There are straight comb stock models available now, but this rifle is a tack driver and light and easy to carry. I don't know anybody who owns one of these CZ rifles who doesn't like it.
TOU
Member
Very nice. I noticed that you have also removed your rear sights too, no?
Krochus, that's total drop from the muzzle, not drop from zero.
If you aren't willing to handload, there's not much reason to look at something like Grendel. But the loads posted for Grendel are very, very mild - you can easily get another 150 fps witout exceeding anything close to safe pressures, and the CZ-527 action doesn't have the pressure restrcitions the AR-15 does.
That being said, I am not a Grendel fanboy, and i think the designer really limited the potential of the catridge by starting with the 7.62x39 case. The 7.62x45mm Czech round would have been a better starting point IMO, and that's exactly what I did with the 6.5x42. I think being able to shoot 144gn 6.5 bulllets is also useless in the grendel, so I effective limited the case to 123gn. Between the two, I got an additional 4.5 grains water in case capacity (ober 10%). and an easy 200 fps speed advantage over Grendel.
Right now I am looking at 6.5x42 vs 6.5x43 to see which will better accomodate reasonable 120 grain hunting bullets.
If you aren't a wildcatter, 7.62x39 is the only choice. But it seems like the miniMauser could use some additional cartridges that had big game potential. Right now, 7.62x39 is it.
If you aren't willing to handload, there's not much reason to look at something like Grendel. But the loads posted for Grendel are very, very mild - you can easily get another 150 fps witout exceeding anything close to safe pressures, and the CZ-527 action doesn't have the pressure restrcitions the AR-15 does.
That being said, I am not a Grendel fanboy, and i think the designer really limited the potential of the catridge by starting with the 7.62x39 case. The 7.62x45mm Czech round would have been a better starting point IMO, and that's exactly what I did with the 6.5x42. I think being able to shoot 144gn 6.5 bulllets is also useless in the grendel, so I effective limited the case to 123gn. Between the two, I got an additional 4.5 grains water in case capacity (ober 10%). and an easy 200 fps speed advantage over Grendel.
Right now I am looking at 6.5x42 vs 6.5x43 to see which will better accomodate reasonable 120 grain hunting bullets.
If you aren't a wildcatter, 7.62x39 is the only choice. But it seems like the miniMauser could use some additional cartridges that had big game potential. Right now, 7.62x39 is it.
Hi, enjoying the CZ 527 thread.....
Is the 6.5 X 42 the 6.5 Lapua? How to make the 6.5 Grendel? It must function fine in the CZ 527, correct?
I'm a big fan of 6.5 (grew up in eastern Montana-Terry)...ended up in ND most of my professional life and now semi in AZ....gave up shooting, etc., for personal reasons and now have restarted....didn't shoot or hunt for about 15 years....
I really like the 5.45X39 and want to build one in a CZ 527.....all I need is the Gunsmith who can open the CZ chromed bolt face about .02" (from 0.378 to 0.394) so the bolt will match the base of the 5.45 cartridge. I bought the gun on sale in a gunshop.
The barrel is no problem. I can buy that commercially....but the ammo must remain steel cased.....as the ability to form the brass is too difficult and too expensive. With that said, a nice little 16" bolt rifle in 5.45 is just what I'm probably going to do as a first project, even if it is a little too extravagant.
If I have the entire metal parts and barrel hard chromed, it will not need a larger bore to begin with, will it? The hard chrome only adds a few 10,000's of an inch, correct?
This is a great thread, but I'm a 6.5 man and the Grendel or 6.5 Lapua sounds really nice in this shorty platform.
Richard
Is the 6.5 X 42 the 6.5 Lapua? How to make the 6.5 Grendel? It must function fine in the CZ 527, correct?
I'm a big fan of 6.5 (grew up in eastern Montana-Terry)...ended up in ND most of my professional life and now semi in AZ....gave up shooting, etc., for personal reasons and now have restarted....didn't shoot or hunt for about 15 years....
I really like the 5.45X39 and want to build one in a CZ 527.....all I need is the Gunsmith who can open the CZ chromed bolt face about .02" (from 0.378 to 0.394) so the bolt will match the base of the 5.45 cartridge. I bought the gun on sale in a gunshop.
The barrel is no problem. I can buy that commercially....but the ammo must remain steel cased.....as the ability to form the brass is too difficult and too expensive. With that said, a nice little 16" bolt rifle in 5.45 is just what I'm probably going to do as a first project, even if it is a little too extravagant.
If I have the entire metal parts and barrel hard chromed, it will not need a larger bore to begin with, will it? The hard chrome only adds a few 10,000's of an inch, correct?
This is a great thread, but I'm a 6.5 man and the Grendel or 6.5 Lapua sounds really nice in this shorty platform.
Richard
6.5 Lapua is 6.5x47 and uses a 0.473 case head. It's hust a shortened 260 Remington with a small primer and better brass, designed to use longer bullets than the 260 (without intruding into the case)
6.5x42 is a wildcat I'm working on, and is based on the 7.52x45mm Czech. It's similar to the 6.5 Grendel but has more case capacity and is limited to bullet weights under 123gn. It has about 12& more case capacity and is about 200 fps faster than Grendel at the same pressure (calculated)
I've just finished the final design of the case, and am ordering custom dies and reamer. More will be posted here as the project progresses.
Here's a comparison:
6.5x42 is a wildcat I'm working on, and is based on the 7.52x45mm Czech. It's similar to the 6.5 Grendel but has more case capacity and is limited to bullet weights under 123gn. It has about 12& more case capacity and is about 200 fps faster than Grendel at the same pressure (calculated)
I've just finished the final design of the case, and am ordering custom dies and reamer. More will be posted here as the project progresses.
Here's a comparison:
stubbicatt
Member
Mighty Mike, the rims on the 5.45 are quite a bit thicker than those on the 5.56 or 223 cases. I think your gunsmith will have to "thin down" the extractor claw to accommodate you.
You can start with a good quality 22 long rifle barrel as groove diameter is the same as the 5.45, .221" or thereabouts.
5.45 is a fun cartridge to shoot, but IMO you will be happier with the accuracy and performance of 223, especially with the better quality bullets, and handloading options abound in 223 which you will not find with the 5.45.
Good luck and let us know how it progresses.
You can start with a good quality 22 long rifle barrel as groove diameter is the same as the 5.45, .221" or thereabouts.
5.45 is a fun cartridge to shoot, but IMO you will be happier with the accuracy and performance of 223, especially with the better quality bullets, and handloading options abound in 223 which you will not find with the 5.45.
Good luck and let us know how it progresses.
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