CZ-527 7.62x39

[excess650]

I know it isn't a military rifle,

[scrapcan]

that should be loads of fun.

[excess650]

My Lee

[onondaga]

There is a couple cast bullet loads and one jacket load over at reloadersnest.com that I am working around with for my Spartan in 7.62X29 with the Lee C-309-150-F. Mine cast small but I have honed out the mold to drop at .313" and I size/check at .312". My bore slugged just under .311".

These loads are listed as MAXIMUM LOADS!

Load ID # 4658 : 158gr RCBS FN-GC. 27.0 gr. H322. 2243 fps 7.62X39mm

Load ID # 4659 : 158 gr RCBS FN-GC. 26.0 gr. Rx-10. 2212 fps 7.62X39mm

Load ID # 5745 : 150 gr Hornady SP. 28 gr. H4895. 2154 fps 7.62X39mm

The 28 gr H4895 is showing no signs of pressure in my rifle at all with my cast 151 gr checked/lubed bullet and accuracy is minute of deer at 2.8 inches @ 100 yds. Still working it !!

Keep us posted.

Gary

[redneckdan]

How much does it weigh sans optics? How good are the irons? I have been pondering over one of those ever since I acquired my 375 H&H safari.

[excess650]

They list 'em at 5.8# w/o scope or rings.

[excess650]

Gary,
Thanks for the data.

[armoredman]

Please see the thread at the top, Practial Done on the 7.62x39mm, for some stuff I have done with my CZ 527M. It is the niftiest little rifle I have ever owned, and it is a joy and a half to shoot. So farthe best I have done is with the NOE 129 gr gas checked boolit.

[excess650]

I shot

[armoredman]

Very nice! I haven't tried any of those boolits. They appear to be a bit longer than the magazine will hold?

[excess650]

They ALL work through the magazine and action. The tapered Saeco can be seated out a bit further, but then won't fit in the magazine and might leave the lube groove exposed.

[Three44s]

You are killing me with this ....... LOL!

Eversince I bought my 527 American in .223 .......... I have LUSTED for a 7.62X39 in one!!! woooooo hooooo !!



Very nice work Excess650!!

Best regards

Three 44s

[excess650]

I REALLY like the full stocked rifle, but wish it came in a larger caliber. The carbine is a real treat. In this day of plastic and stainless steel, its nice to have the option for blued steel and real walnut.


You are killing me with this ....... LOL!

Eversince I bought my 527 American in .223 .......... I have LUSTED for a 7.62X39 in one!!! woooooo hooooo !!



Very nice work Excess650!!

Best regards

Three 44s

[armoredman]

I have to agree, my little 527M is the rockingest light rifle I have ever owned. I'd hazard a guess it's the one firearm I enjoy shoointg the most right now....neck and neck with the Phantom.

These are the boolits/loads I use with mine, which is why I was surprised those loads above worked int the 527 magazine.

http://i16.photobucket.com/albums/b13/armoredman/casting%20stuff/currenthandloads762x39.jpg

If you can get a CZ 527M, grab it! :D

[johnly]

CZ 527s in 7.62x39 are worth seeking out. Anytime I find one at a reasonable price I buy it. I'm up to 4 [smilie=1: and still looking for #5.

Great for shooting cast or turing into PPCs or Grendels.

John

[Larry Gibson]

I feel like the bastard step child as my bolt 7.62x39 is just an older Mini MK X.......can I play?

Larry Gibson

[excess650]

I made it to the range again today.

[excess650]

I feel like the bastard step child as my bolt 7.62x39 is just an older Mini MK X.......can I play?

Larry Gibson

I wouldn't know why not!

[excess650]

I shot again

[excess650]

It quit raining

[JDL]

They sent a stronger mainspring for mine and all misfires disappeared. These little rifles are just too much fun and will sure put the whomp on armadillos! I use a 165 grain boolit that's from a Mountain Molds mold together with surplus 4895 or WC-844 that runs them about 1900 fps. I keep telling myself to get rid of all the excess baggage and just use this for everything including deer. Yea, like that's going to happen!;-)
JDL

[onondaga]

Your groups are tightening up! looking good. I have two more workup loads to shoot up. The A2230 powder for the X39 is not looking outstanding on paper yet. This is disappointing as I bought a pile of it. Showing no pressure signs for me at 1/2 grain below listed max. MAX loads are in the box to range next. They are 100% capacity right to the base of the neck where my gas check is just contacting. Group size has remained constant in this work-up. Hoping for a dip. I will go past MAX and compress loads if I get no pressure signs. The creep and heavy trigger pull may be what is limiting me. All my other rifles have excellent crisp trigger pulls that are quite light.

Worst news here is that 2 local gunsmiths won't do trigger work on Biakals and the third estimated $120.00 for zero creep and 3# pull on my rifle for polishing/refit all action parts and re-cut new sear angles. This is not happening with my SS check. I was hoping for $40.00, but all my old smiths are dead. I am real tempted to buy my own mainspring compressor and tackle the job myself.

Hope you get your mainspring quick.

Gary

[excess650]

Gary,
Have you tried magnum primers with that ball powder?

[NoDakJak]

onandaga: My load testing with my Remington Spartan (Biakal) has been limited until I can do something with the trigger. It must have a pull in excess of twenty pounds. I hate trigger work but guess that I am going to finally attempt it myself.
My favorite load in my CZ 527 is with the Lee bullet with 16.5 to 18.0 grains of 1680. My barrel mikes at .311 and I size and lube to .312 with Hornady Alox. I have a Modern Bond mold that casts a 140 grain spitzer tht I want to try. A friend uses Lyman 31141 and 4895 to good effect. Works well on deer.
Neil

[onondaga]

Check your PMs. I sent you one on the trigger problem.

Gary

[onondaga]

I am not familiar with the CZ bolt strip down or if you need a specific tool to take it down. Look into that. Cleaning a bolt out and high shining the firing pin can make a big difference, Oil the pin with Triflon or a good oil with teflon after cleaning /polish.

Haven't tried magnum primers. My ignition has been 100% for 200 rounds in bitter cold here so I'm not worried I'll need magnum primers with the ball powder. All My X39 brass was purchased new Winchester brand.

I think we both have good bullet diameters to work with also. Keep shootin! I just loaded some compressed loads with H4895. Had no pressure signs 1/2 grain lighter. I have a chronograph, but won't be clocking till I get the group size I want. This load should be at about 2150 fps, right where I want to be !!! I am going to work past that with all my powders and hunt with the best one. So far H335 is what my rifle likes the best. The last resort trick I have is H380. It will work but there is no data so far. I will research that some more.

Gary

[NHlever]

I am not familiar with the CZ bolt strip down or if you need a specific tool to take it down. Look into that. Cleaning a bolt out and high shining the firing pin can make a big difference, Oil the pin with Triflon or a good oil with teflon after cleaning /polish.

Haven't tried magnum primers. My ignition has been 100% for 200 rounds in bitter cold here so I'm not worried I'll need magnum primers with the ball powder. All My X39 brass was purchased new Winchester brand.

I think we both have good bullet diameters to work with also. Keep shootin! I just loaded some compressed loads with H4895. Had no pressure signs 1/2 grain lighter. I have a chronograph, but won't be clocking till I get the group size I want. This load should be at about 2150 fps, right where I want to be !!! I am going to work past that with all my powders and hunt with the best one. So far H335 is what my rifle likes the best. The last resort trick I have is H380. It will work but there is no data so far. I will research that some more.

Gary

Gary, if you send me a PM with the components you want to use, I can run them through Quick Load for you. You still would need to exercise caution of course, but it would give you a place to start. QL will give expected pressures, and velocities too if you include the barrel length, etc. On the other side of this 7.62x39 loading game, it makes a very good 32-20 with 8 grains of Unique behind a 115 grain boolit. Feeding is no issue with your single shot, but since CZ changed the magazines some years ago, the Lyman 311008, and 311316 fed very well indeed.

[excess650]

I'll try more powder.

[JDL]

The only loads I didn't have misfires with, before going to the stronger mainspring, was Lapua. These cases never varied on on length from the case head to the datum line. All other brands I measured differed as much as .006". Wolf was the worst offender but, Winchester differed up to .004".
JDL

[GBCAPT]

I just got a new 527 carbine in 7.62 X 39 and am figuring out how I want to set it up. I plan to use it to swat coyotes and deer in thick, but small woodlots here in Maine.

I contacted New England Custom Gun who imorts some nice aperature sights that utilize the reciever grooves on Ruger, CZ-550 and Tika rifles. They advised that they have a model in the works for the CZ-527 and hope to have them in inventory by mid-summer.

I find an aperature sight easier to use once one becomes accustomed to it, and the longer sight radius resulting from the sight being on the receiver instead of on the barrel contributes to improved precision.

No price point at this time, but I plan to check back later.

[excess650]

.311" sizing.

[excess650]

Gbcapt,

[onondaga]

The Lee Collet neck size die will need another part for cast bullets. Here Is The response I just got from Lee:

Mr. xxxxxxxx:

The 7.62x39 Collet Die Set includes the Mandrel for .308 bullets but to size the neck for .311 or .312 bullets you would be able to use the 303 British Mandrel. The part number for the Mandrel is NS2628 and costs $4.00.

Thank You
Lee Precision

I can also tell you that the new mandrel will be too long and require shortening to the length of the one supplied with the die.

Gary

[whopist]

Onondaga
If you do the Lee Collet Die .312 mandrel modification, please share procedure and results with us.

Everybody
I too had misfires in my 2007 CZ 527M in x39. CZ sent me a stronger main spring and it, (along with a good cleaning) solved my misfire problem. The new stronger spring was a lot harder to install on the bolt.

Someone on the web posted a procedure to fabricate a spring spacer to make spring tension greater. Just another idea.

Good luck

[JDL]

I have only the LCD for my 527 and modified it so that it doesn't size all the way but, leaves about 1/16ths inch of the mouth unsized. No need for an M die!
I don't think the mandrel is all that important for boolits unless the case mouth is exceedingly misshaped. I adjust mine so I have the proper tension for the size boolit I'm using and use that process for 7.62x39, .30-30, .30'06, and 7.5 Swiss.

JDL

[excess650]

JDL,
Thanks for that bit of info.

[onondaga]

I am saving up for the Lee Collet neck sizer and the .303 Brit mandrel. Full length sizing I can only get 27 grains of H380 into the 7.62X39R and that is a slightly compressed 102% load. Not happy about that because H380 is a nice low pressure powder for cast bullets and 30 grains bulges the base of the neck. I had to unload the single round I tried in a test loading and back off, H380 powder doesn't compress well.

Next month I will order the new Collet die and mandrel and report on it. Neck sizing only will significantly increase the case volume available for this low pressure powder.

Gary

[excess650]

here tomorrow.

[onondaga]

Sounds like the H322 is getting you where I want to be with my 7.62X39Rs. A reduced load calculator says 25.6 Gr H332 = 2150 fps. That is what I'd like for deer hunting with that bullet.

Reduced Load Calculator link:

http://www.handloads.com/calc/reduced.asp

I will have to try that powder if I run out of options here without getting an accurate load at 2150 fps. I am looking for less than 1 inch at 50 yards. My best results have been at just over an inch at that velocity with H4895.

Gary

[dualsport]

I feel like the bastard step child as my bolt 7.62x39 is just an older Mini MK X.......can I play?

Larry Gibson

My 7.62x39 is an H&R single shot. It likes the Harris designed Lee CTL-312-160 2R and a brisk load of WC844. So far 2" groups at 100 yds. are repeatable, I'm hoping to refine that some. I had a Mini Mk X in .223, most accurate rifle I've ever shot. That was in the 80s, the thing was a work of art. Hit a dime everytime at 100 yds. with Winchester hollow points. I am very very sorry I sold it. On a side note, speaking of Lee collet dies, my .303 LCD also neck sizes 7.62x54R very nicely.

[Crash_Corrigan]

I have one of those CZ 527's. However mine is a full stock model in .223 Remington. All of my cast boolit shooting has been done using 10 gr of Unique under a 52 GR RNL boolit.

The single set trigger is a joy to use and the pictured gun has a honking big gallumpus China Made el cheapo Telescopic Sight mounted on it. It works but it is just much too big and heavy and ruins the beautiful lines of the rifle.

It looks a tiny yellow polka dot bikini on an East German Lady Weighlifter. It just doesn't float my boat. Recently I bought a Leupold Optic that is much smaller, trimmer and lighter than the one pictured. However my digital camera is mammaries up at the moment and will require replacement. Not too shabby for having only paid $200 for it about 7 years ago.

With the new Leupold sughts this neat and nice handling rifle will group all day long at less than 1/2 inch at 50 yds, about an inch at 100 and is a lot of fun smacking the steel at 350 yds. At that distance we were shooting .223's, 308's, 30-06's and BPCR rifles of 45 and 50 calibre. I set up the spotting scope directly behind the shooter and the lighting was just right and we could see the boolits flying down range and impacting on the target at 350 yds.

The 308's were really motoring along and shot pretty flat as compared to the others. The .223 was moving along at about 1750 FPS per the chrony and was visibly much slower than the 308. The real slowpoke was the BPCR rifles. Both the 45-70 and 50-90 Sharps seemed to crawl as compared to the other calibres.

Also the arc to the target at 350 yds was way above the arc described by the faster rifles. However at 550 gr and 695 gr the slower and relic calibres would have certainly been much more destructive than the lighter and faster rounds.

However the recoil on the BPCR's was certainly a lot more than the more modern rifles. My shooting buddy also had a 50 BMG bolt rifle that he was tweaking for a friend of his. I let off one shot with that rifle and it was a lot lighter in recoil than I expected and also a lot lighter recoiling than my 50-90 Sharps. However at the cost of $6 a round I would certainly not shoot this gun too much.

And no, we did not shoot this behemoth at our steel targets as we like ours just the way they are....splatter with lead.....and without holes punched in them.

Getting back to the CZ 527. I love mine and I certainly would consider getting another in the caliber you have. The only problem I can forsee is getting my paws on enuf cases at a reasonable cost. My .223 cases are mostly range pickups from AR blasters who have more money than brains. The military crimped ones get a run thru a Dillon Swager 600 model and are not a problem. I reload them in my Dillon 550B and a bunch can be done PDQ. The biggest cost is the primers. Boolits are hand cast WCWW's, cases are free and a loading of 10 gr of Unique from an 8# jug is miserly.

Our shooting group does two group buys for powder and primers. One is for BPCR and it is mostly for black powder. The other one is for powder and primers. We research to find the best prices and we have found Powder INC to be the cheapest source of Swiss Black Powder and they have earned our business recently. For the other we are always looking for sales etc and we have bought from multiple sources over the years. By buying in large quantities we save a lot of cash. The only bad part is that the UPS guy hates me.

[rststeve]

I have wanted one of these for years can't seem to come up with a used one. So let me know when your done with this one Ha Ha. Real nice good shooting

[armoredman]

Taking my 527 out again tomorrow...adjustable folding rear sight installed and sighted in, scope remounted, ( I just wanted an adjustable folding rear sight that's all), and we're gonna see what this caliber can do at 300 yards, the farthest range I have available.

[clodhopper]

All the fun you guys are having with you CZ's and cast bullets.
One with leopuld rifleman 2X7 scope on it rests in my safe, and 40 or 50 rounds loaded with the lee 113 fp bullet are handy.
H322 launches that stubby flat point, groups at 100 yards are about 1 inch wide by up to 1 3/4 tall, some with less vertical stringing.
The H322 often leaves unburned kernals in the bore and fired case.
Might have something to do with the vertical stringing.
I really should get that rifle out and spend more time with it.

[excess650]

the 18-1/2" barrel.

[excess650]

. There is only lube ahead of the GC.

[onondaga]

You really have your X39 dialed in now. My Spartan X39 trigger work came out under 3.5 lbs and the rifle is finally dialed in and sighted in for my grandson to hunt with. Chronograph results have been pleasing to at 2161 fps for my Lee 150 gr flat-nose with 28.1 grains of Accurate 2230.

Here is my last target that is very representative of the last several targets and a few later, it hits here at 50 yards:

http://i30.photobucket.com/albums/c338/rhymeswithwhat/x39Targ-1.jpg
That is 5 shots, the top right hole is a double hit.

And the boolits look pretty too:

http://i30.photobucket.com/albums/c338/rhymeswithwhat/x39ammo.jpg
I loaded up 50 for the season for him.

Final Ballistic sheet:
http://i30.photobucket.com/albums/c338/rhymeswithwhat/X39BALpic.jpg

Gary

[PB234]

I have a 527 carbine in 223. The first thing I did was to swap out the firing pin spring for a higher power spring which cost something like $12. No problems at all and a pleasure to shoot. Use a 4X Kollmorgan 26mm scope mounted in30mm detect rings with a adapters down to the 26mm. As they are detach the scope can move to the next 527 carbine when it comes my way.

Had the bolt jeweled and its pretty.

If you want the spring look at the CZ forum on www.rimfirecentral.com and the people who make it advertise there. Might be J&P. The gentleman who jeweled it also advertises there. Something like demag enterprises.

Want a 527 American in a Hornet. Ever see the groups they produce?

[excess650]

I fully expect to carry mine for whitetails.

[onondaga]

The alloy I use has been very consistent for me and mixed from my inventory here of ingots I have made from clip on wheel weights only and I alloy loose Linotype I buy in bulk to the ingots in the pot when I begin a session. My alloy is WW:Lino with a ratio of 7:3 and invariably tests with a Lee Hardness Test Kit making a .060" indent charting at a BHN just over 14 when the boolits are 10 days old after towel drop casting.

Your mold could easily be bigger! I wouldn't complain at all if mine were 10 grains heavier.

I wanted to use this alloy at BHN 14 ( just a smidgen softer than Lyman #2 ) because out at 150 yards, as you see on my ballistic chart there is still 1000 foot pounds of energy and that should expand boolits of this alloy to double diameter on game impact. I feel secure telling my grandson he can get humane, clean kills at 150 yards with the Spartan in 7.62X39 with this load. He is a fine marksman and already has that skill honed. He has grouped tighter than I have with this rifle twice so far.

Gary

[excess650]

they'll work well.