Milsurp98 wrote:Straight from the CZ web site: http://cz-usa.com/product/cz-527-carbine-223-rem/
Built to CIP specifications, our 7.62×39 chambers are ideal for shooting steel-cased surplus ammo. Designed to shoot .311 bullets, some American brass ammo may not perform as well as the imported steel-cased variety because of SAAMI brass dimensions and varying bullet diameters.
Our .223s will happily eat 5.56, since CIP doesn’t differentiate between the two cartridges and just has the higher pressure as its standard. So our .223s will shoot everything from the cheapest Russian steel to match .223 brass ammo.
Gwion wrote:I'd personally just load up 15 at 28.3 and confirm with 3 groups of 5. Looks consistent through that range where as other loads spread on either side, if that makes sense. This should give you a little leeway for changes in conditions or 0.2 grain variation in charge.
Dexer wrote:Looks brilliant.
Can you see the front sight through the scope? I had that on a rifle once and found it really distracting.
I do love these firearms...
SHV wrote:Gwion wrote:I'd personally just load up 15 at 28.3 and confirm with 3 groups of 5. Looks consistent through that range where as other loads spread on either side, if that makes sense. This should give you a little leeway for changes in conditions or 0.2 grain variation in charge.
good idea, will try, thanks
also will try trail boss, I don't know why the reloads drop few cm compares to the factory ammo and looks like it stay there no matter how much powder loaded, maybe it is due to the different projectile or maybe the 8208 burning rate is too slow for the 7.62x39, especially for the sort barrel carbine?
Gwion wrote:I wouldn't be too worried anout that different POI. As lol Ng as it is consistent and you can learn its drops. If it is s concern, as above, try a different powder.
Gwion wrote:Dunno. Try it and find out. What would you use the TB loads for?
SHV wrote:also will try trail boss, I don't know why the reloads drop few cm compares to the factory ammo and looks like it stay there no matter how much powder loaded, maybe it is due to the different projectile or maybe the 8208 burning rate is too slow for the 7.62x39, especially for the sort barrel carbine?
in2anity wrote:SHV wrote:also will try trail boss, I don't know why the reloads drop few cm compares to the factory ammo and looks like it stay there no matter how much powder loaded, maybe it is due to the different projectile or maybe the 8208 burning rate is too slow for the 7.62x39, especially for the sort barrel carbine?
Factory powder is mystical magical stuff - FWIW my 30/30 seems to boot a lot harder with factory ammo compared to (MAX) handloads of a variety of powders (i.e. 2208,2207,2206), I always wondered why...
Trail boss will be perfectly safe mate, just don't compress it. Give it a go and post your results; I'd love to see how she handles it! If it's accurate, it'll be capable of taking down bigger game than rabbits...
Gwion wrote:I wouldn't be too worried anout that different POI. As lol Ng as it is consistent and you can learn its drops. If it is s concern, as above, try a different powder.
No1Mk3 wrote:Dear MickW,
I am sorry to hear your vacillation regarding 30/30 lever or 7.62x39 bolt is causing hardship, so may I offer a way to ease your suffering that I have used for many years? Find a quiet spot near your gunsafe, assume the Lotus Position, close your eyes and repeat, "I can have BOTH...I can have BOTH...I can have BOTH" before you know it, you will be at peace.
in2anity wrote:Nice SHV - remember TB isn't renowned for it's pinpoint accuracy. It's advantage comes from its economy and less wear-and-tear on your rifle.
Gwion wrote:Not sure what primers are used in that cartridge but I definitely found that using Small Rifle MAGNUM primers for Trail Boss in my 223 improved consistent velocity as well as precision and group size. In fact, I literally just finished priming 50 cases with SRM primers for a fresh batch of TB 223rem.