7.62X39 boolit sugestions plz.

[PB234]

In the process of getting a CZ 527 7.62X39 which CZ states "uses a .311 bore". I figure that a .312 boolit is the right size and ask for suggestions as to what to try first?

Thanks

[stubshaft]

Lee 312-155-2R should work in it.

[excess650]

Lee C309-150-F

[Larry Gibson]

Lee 312-155-2R should work in it.

+1, that Lee bullet works extremely well in my Mini MK X Mauser with .311 groove depth and standard 9.5" twist. For hunting the GB C312-160-WFN also is excellent. That i very similar to the RD bullet currently available I think.

Larry Gibson

[PB234]

Thank you all. Excess650309, if I can get results like that it would make me delighted. Is that a .309 boolit going down a .311 barrel? Surprising as it would seem undersized.

[Bret4207]

Just 'cuz the maker calls it a "309" doesn't mean it drops them at .309. In fact, it's a good thing for us that most drop .002-004 over or we'd be up the crick w/o a paddle!

[excess650]

Thank you all. Excess650309, if I can get results like that it would make me delighted. Is that a .309 boolit going down a .311 barrel? Surprising as it would seem undersized.

No, my old single cavity drops .312". I lube and gascheck in a .313" die with lube only ahead of the GC(160gr with GC and lube). I've tried it sized .312" and with more lube, but the .313" combination works best. BTW, I got superb accuracy with 23-25gr H322, but settled on 24gr as a hot weather compromise.

Other boolits that I've shot and group accurately are the 311041, and Saeco #315. The Lee load just happens to be my preferred load due to combination of boolit weight, velocity,and accuracy. The heavier Saeco and 311041 weren't going as fast and recoil was noticeable in the flyweight rifle.

BTW, I've used the Lee/H322 combination on silhouettes and it will knock down rams at 500m, but you have to hit them above center.

Lapua cases seem to be the best out of the box as far as dimensions go. Other brands have some headspace, and the CZ-527 may not set off rifle primers in those cases consistently(first firing). Once they are fired, there isn't a problem. WW cases (new) suck because they vary in length and the necks aren't even trimmed square.:confused:

[PB234]

Thanks, I am new at this.

May I also ask if you think this would work well http://castboolits.gunloads.com/showthread.php?t=142028 or would I be better trying this http://castboolits.gunloads.com/showthread.php?t=131471 at .314 sized down to .313 or .312?

Thanks for your time and sharing of your knowledge.

[excess650]

I would suggest you start with the Lee and get a baseline load first. I think the NOE Ranchdog 311-165 will work and I'm thinking the .311" version rather than the .314". I'll check mine and see what the as-cast diameter is. I think the ogive is fat enough to cause the boolit to need to be seated deeply.

The 7.62x39 will shoot heavier boolits, but the cartridge was developed with 125-130gr. The CZ-527 is a flyweight, so recoil will become more noticeable as boolit weith and velocity increases. I have lighter boolits as well, but haven't found a lighter design that groups as well consistently.

BTW, the Lee C309-160 has similar dimesions, but with a rounded nose.

[6.5 mike]

Any one try the lyman 311410 ? Mine drops at 135ish with 50/50. Only thing I have in that caliber is a sks.

[PB234]

Excess, thank you for the good advice which I intend to take. Very happy to get this CZ as it looks about perfect for what I want. Now if I can get it to preform like you have yours preforming it will be remarkable.

[excess650]

I bought my CZ 527 new and have never fired a single round of jacketed through it.

[PB234]

Mine is new to me and a number of years old. The prior owner never fired a round through it. Still in the box with even the plastic bag CZ shipped it in within the box. Came with factory scope mounts, but intend to use a old 4x Kollmorgan scope which I already have in suitable detach mounts on another rifle. Also have an older (1980s) Mannlicher 3x9 scope with the German 3 post type of reticule which is fitting for a hunting rifle, but the Kollmorgan is just a really nice old small scope.

I do not intend to shoot jacketed through this either. Why do so if groups like you have are possible using cast?

Thanks again, really been looking for this rifle for a while and finally found the right one to try.

[excess650]

The CZ 527 in 7.62 x 39 is a pretty small rifle, so would look out of place with a large scope. The Nikon I chose is relatively compact and is spec'd at 5" of eye relief (shotgun scope). A Leupold 1-4x (or similar sized) would look good. Mine did not come with factory rings, so I opted for Burris.

Boolits pictured (L-R) are Lee C309-150-F, Saeco #315, and a group buy clone of the 311041. As pictured they function perfectly throught he magazine and lightly engrave when closing the bolt.

[excess650]

Thanks, I am new at this.

May I also ask if you think this would work well http://castboolits.gunloads.com/showthread.php?t=142028 or would I be better trying this http://castboolits.gunloads.com/showthread.php?t=131471 at .314 sized down to .313 or .312?

Thanks for your time and sharing of your knowledge.

I just checked the NOE Ranchdog 311-165 sized .312" in my CZ 527. With the ogive engaging the rifling, the gas check is at or below the shoulder/case body junction.

The 311041 is a better fit, IMO.

[DrCaveman]

I just ordered 2 Lee dies that I hope will work: c309-150 f, and ctl312-160 2r.

I figured the 150 would work great in 30-30 and 30-06. Hoping that they work in 7.62x39 also. Hoping too that the 160's will work in the American 30 cals after sizing. I still have to determine exactly what sizing that will be, I guess I gotta slug the barrels.

Anyway, I can say that I have shot Yugo surplus ammo through my CZ527 into moa at 100 yards. I haven't given it rigorous tests beyond that distance, but 100 was all I was expecting anyway ( for that level of accuracy).

I must also report that I had 3 FTF from this ammo in this gun, out of probably 80 rds. Not a single FTF with AK variants, same ammo. I could even take the cartridge, with primer indent, and load it in the AK and it would shoot. So, not the cartridges fault, per se, but the cartridge and gun did not get along that well (except pretty dang good accuracy). I plan to use federal primers, at least during load development, for the cz527.

[leadman]

I was measuring some Tula 7.62 X 39 loaded ammo and from what I could measure it is under SAAMI spec for rim to shoulder length.

I am assembling a '93 Mauser with a Numrich 7.62 X 39 barrel and rented the reamer to finish cutting the chamber on it. I also checked my reaming job with go and no-go gauges.

Brass sized in my Lee dies fits well but the Tula I can put scotch tape on the base and you feel no difference when closing the bolt.

Now to tackle the feeding and extraction issue later in the weak.