CZ527 carbine 7.62x39

Bolt action rifles, lever action, pump action, self loading rifles and other miscellaneous longarms.

Re: CZ527 carbine 7.62x39

Post by SHV » 24 Aug 2017, 9:54 am

Gwion wrote:No you don't have to enlarge anything. A quick web search will tell you what primers are available.


the magnum primer doesn't help on accuracy, also 3 of 15 didn't fire :crazy: will try it on Sako A7 and tikka battue, maybe is the CZ doesn't strike big and hard enough on the primer
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Re: CZ527 carbine 7.62x39

Post by Gwion » 28 Aug 2017, 10:57 am

Huh.... Interesting! Was worth trying out, I guess. Definitely made a difference in 223 with TB but that is small rifle magnum primers.
Sorry for the bum steer but still, now you have tried it and know the result.
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Re: CZ527 carbine 7.62x39

Post by SHV » 28 Aug 2017, 11:27 am

Gwion wrote:Huh.... Interesting! Was worth trying out, I guess. Definitely made a difference in 223 with TB but that is small rifle magnum primers.
Sorry for the bum steer but still, now you have tried it and know the result.


maybe the 7.62x39 case is short so there isn't much difference, 5.56 and 308 case are much longer so it makes lot difference... will try 10 gr TB subsonic 308 next time :lol:
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Re: CZ527 carbine 7.62x39

Post by Gwion » 28 Aug 2017, 7:00 pm

You might have a pount there, re: case length.
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Re: CZ527 carbine 7.62x39

Post by SHV » 30 Aug 2017, 7:41 pm

Gwion wrote:You might have a pount there, re: case length.

tried TB 10 gr "subsonic" 308, the CCI magnum primer looks much better than the normal big rifle primer :lol: and I am lucky 10 gr TB charge looks good, may no need to try other different charges
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Re: CZ527 carbine 7.62x39

Post by Gwion » 31 Aug 2017, 2:02 am

Nice one.
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Re: CZ527 carbine 7.62x39

Post by Big Trev » 07 Mar 2020, 5:00 pm

For the life of me can’t work out why 303 /311 projectiles are so expensive and in limited weights. The prices almost make you vomit. I have a Howa 7.62x39 varmint and would love to do some experiments with loads but the projectiles are too expensive. I don’t know why no one has sourced someone who is prepared to drop the price. Let’s face it there not made out of gold
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Re: CZ527 carbine 7.62x39

Post by InisBineest » 08 Mar 2020, 1:15 pm

Big Trev wrote:For the life of me can’t work out why 303 /311 projectiles are so expensive and in limited weights. The prices almost make you vomit. I have a Howa 7.62x39 varmint and would love to do some experiments with loads but the projectiles are too expensive. I don’t know why no one has sourced someone who is prepared to drop the price. Let’s face it there not made out of gold


If you have the time, I highly recommend casting your own. ITs a bit to set up, but much much cheaper in the end (if you discount the time spent as job satisfaction;)
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Re: CZ527 carbine 7.62x39

Post by in2anity » 08 Mar 2020, 1:56 pm

InisBineest wrote:If you have the time, I highly recommend casting your own. ITs a bit to set up, but much much cheaper in the end (if you discount the time spent as job satisfaction;)

Or you could buy the 1000 pack for $129 and get better velocities, not to mention save yourself a huge amount of effort... just sayin. Plated bullets are also more accurate in my experience.
At what point does lack of maintenance become patina?
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Re: CZ527 carbine 7.62x39

Post by flutch » 08 Mar 2020, 4:06 pm

SHV wrote:I like short/light rifles :lol:
113112eiejnb4nnxi4e0iz.jpg



been wanting one of these, dunno how I will go getting a 7.62x39 when I have a 270 and 300win whilst living in the police state of WA
Guns:
Rossi S/S 410
Lanber U/O 12 gauge
Adler B220PG 12 gauge
Ruger 22lr
Remington 270 win
Howa 223
Weatherby 300 Winmag

Bows:
G5 Quest Drive
G5 Prime Defy
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Re: CZ527 carbine 7.62x39

Post by JimTom » 08 Mar 2020, 4:41 pm

As I am Sure you already know, the 7.62x39 is vastly different in ballistics and purpose to that of .270, and 300WM. Is that not justification enough in WA mate?
That was a genuine question too mate, not having a go. I know you blokes have it tough over there in WA justifying ownership but if they can’t see the difference then they are A-Grade faaarkwits.
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Re: CZ527 carbine 7.62x39

Post by JimTom » 08 Mar 2020, 4:45 pm

By the way, the CZ527 in this chambering is an awesome bit of kit. I don’t personally own one however I have had the opportunity to use one on several occasions and for what it’s worth I rate it.
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Re: CZ527 carbine 7.62x39

Post by InisBineest » 08 Mar 2020, 9:25 pm

Or you could buy the 1000 pack for $129 and get better velocities, not to mention save yourself a huge amount of effort... just sayin. Plated bullets are also more accurate in my experience.


I prefer the satisfaction of making them for the price of the gas i use, but honestly, it took me about 3-5 hours to do 500 for my .38/357 so it is time intensive. I also powder coat, which allows nearly jacketed velocities without copper fouling (you can get plastic fouling but it seems to scrub out easier than copper). As for accuracy I honestly can't comment, I've never made serious comparisons and i don't benchrest with them. I'm sure there is information on that if you look. I'm happy to plink around with my loads and just enjoy them, that's the trick isn't it:D
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Re: CZ527 carbine 7.62x39

Post by in2anity » 09 Mar 2020, 9:56 am

InisBineest wrote:I prefer the satisfaction of making them for the price of the gas i use, but honestly, it took me about 3-5 hours to do 500 for my .38/357 so it is time intensive. I also powder coat, which allows nearly jacketed velocities without copper fouling (you can get plastic fouling but it seems to scrub out easier than copper). As for accuracy I honestly can't comment, I've never made serious comparisons and i don't benchrest with them. I'm sure there is information on that if you look. I'm happy to plink around with my loads and just enjoy them, that's the trick isn't it:D


There is something deeply satisfying with crafting a round that punches way above its price point - I get it, I've been there myself. But IMO cast bullets are more suited to pistol-cartridge velocitiies, where the explicit speed matches (generally) what a lead bullet can tolerate. That way you can still achieve good case fill using the powders designed for that cartridge/gun. Keeping it nice and simple. I suppose that's why most lead bullets you see on the shelf are for pistol. Trail Boss certainly goes against the grain here - that's what makes it so unique, but Trail Boss velocities are slow, which can (obviously) be detrimental with a fluctuating crosswind.

There is a stong argument for when the price difference between jacketed vs cast is substantial, for example a 30/30 bullet. But in Big Trevs's 7.62x39 example, the Berry's plated bullet is only 13c / round (excl. postage) - you'd be doing well to cast your own for a whole lot less than that. Not to mention the time and effort required to cast.

Accuracy does come into play her; for standing offhand shooting the bullet will usually outperform the shooter, making a lead bullet a good candidate for such disciplines as lever action metallic silhoutte, or perhaps even service rifle on the 100m mound. Or generally if you're simply into that kind of plinking. But Big Trev specifically talked about a "varmint" round; to me that seems more geared toward an accuracy shot from a supported position.

Dunno, perhaps I'm reading into it too much :lol:

In any case, the Berry's bullet has shot suprisingly accuratly for me, and they are extremely well priced.
At what point does lack of maintenance become patina?
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Re: CZ527 carbine 7.62x39

Post by SHV » 10 Mar 2020, 8:15 am

I've got a little for test, first tested on cut barrel No.4 MK 1, it spreads everywhere on A3 paper at 25 meters, never seen this kind of accuracy before, maybe due to the barrel is not suitable for this projectile and TB combination , on 527 should be fine, will test later

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Re: CZ527 carbine 7.62x39

Post by SHV » 10 Mar 2020, 9:37 am

cz527 77tb.jpg
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forgot to update, the 7.7 TB is good
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Re: CZ527 carbine 7.62x39

Post by SHV » 10 Mar 2020, 9:39 am

26.5gr 2207 TBF 2 X 5 shot

cz527 265 2207.jpg
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Re: CZ527 carbine 7.62x39

Post by JimTom » 10 Mar 2020, 9:57 am

Is that at 100m mate?
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Re: CZ527 carbine 7.62x39

Post by SHV » 10 Mar 2020, 12:58 pm

that's St Mary's 50m indoor
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Re: CZ527 carbine 7.62x39

Post by in2anity » 10 Mar 2020, 1:09 pm

SHV wrote:I've got a little for test, first tested on cut barrel No.4 MK 1, it spreads everywhere on A3 paper at 25 meters, never seen this kind of accuracy before, maybe due to the barrel is not suitable for this projectile and TB combination , on 527 should be fine, will test later


Sorry SHV what bullet is that? what's TBF150? aren't they Berry's?
At what point does lack of maintenance become patina?
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Re: CZ527 carbine 7.62x39

Post by SHV » 10 Mar 2020, 2:14 pm

in2anity wrote:
Sorry SHV what bullet is that? what's TBF150? aren't they Berry's?


that's Berry's, not good on cut barrel long branch No.4 MK 1, have not tried it on Savage No.4 MK 1 and CZ527 yet
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Re: CZ527 carbine 7.62x39

Post by in2anity » 10 Mar 2020, 7:41 pm

SHV wrote:that's Berry's, not good on cut barrel long branch No.4 MK 1, have not tried it on Savage No.4 MK 1 and CZ527 yet

Some of the LEs have trouble stabilizing certain bullets, especially the original two groove barrels. Shooters put it down to its lesser ability to grip the bullet. That’s why the boat tail bullets might not work as well as a flat base (of approx the same weight) - as the BTs have less bearing surface to work with combined with only the two grooves. The shorter bearing surface on those lighter Berrys bullets might therefore be suffering the same fate (they are 123gr right?).

Also another characteristic of the LEs is some don’t like a big jump to the lands - maybe the shorter Berrys bullet does not work well in this regard. Lots of anecdotes but my No4 certainly likes a long bullet seated out as far as possible.
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