New 223 Ai build

The 75 scirocco, expensive no doubt, is a great game bullet, at least at 22-250 speed. But again, it prefers a jump from 30 to maybe even 70 thousandths. I think they make a 62 as well.

I still have one box of the bear claws, saving them for a rainy day I guess.

 
Stan, CZ527 is teaching you how to make longer bullets work in a short magazine, jumping...good explanations on his part.

I was teaching you how to design the throat for short bullets in a short magazine.

I hope you did not get confused in the discussion.
 
Thanks for your advice.
Called my gunsmith today and told him to make a dummy round with the 53gr V-Max and cut the freebore to suit that bullet.
I emailed Claw bullets of our local manufacturers and asked about options for heavier bullets. He told me he makes a bonded 70gr flat base round nose bullet that should work nicely. But he said he'll ship me a couple of different weights to test them first.
Now the long wait.
First the gunsmith has to send a motivation to the police, stating why this rifle needs another barrel.
If that is approved....could take up to 90 working days....then i have to wait for my lisence card...this could take 1-2 months.
So i guess ill be happy if i get it by xmas.
Bit tougher here in sunny SA.
 
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Originally Posted By: Stan da ManThanks for your advice.
Called my gunsmith today and told him to make a dummy round with the 53gr V-Max and cut the freebore to suit that bullet.
I emailed Claw bullets of our local manufacturers and asked about options for heavier bullets. He told me he makes a bonded 70gr flat base round nose bullet that should work nicely. But he said he'll ship me a couple of different weights to test them first.
Now the long wait.

So i guess ill be happy if i get it by xmas.
Bit tougher here in sunny SA.

Your problem is that short magazine, 2.260". Don't worry about cartridge overall length because any bullet seated to your magazine will be jumping to the lands, just a matter of how much. A lot or a whole lot. My 223AI reamer has no freebore, you can't get any less than that. Cartridge length with a 53VMax seated to the lands of a fresh chamber is 2.330". So even with a zero freebore chamber you'd have to seat the bullet way shorter than that to fit the magazine. The old Sierra Blitz 50 seated to the lands is2.265", the 55 is 2.285"......good bullets and accurate, I shot a ton of them, but without the high BC of plastic tipped bullets. Every bullet I tried from 50gr to 60gr, seated to the lands, made a cartridge too long or way too long for that magazine.
Just have your gunsmith cut a chamber with NO freebore, none.
 
Originally Posted By: AckmanOriginally Posted By: Stan da ManThanks for your advice.
Called my gunsmith today and told him to make a dummy round with the 53gr V-Max and cut the freebore to suit that bullet.
I emailed Claw bullets of our local manufacturers and asked about options for heavier bullets. He told me he makes a bonded 70gr flat base round nose bullet that should work nicely. But he said he'll ship me a couple of different weights to test them first.
Now the long wait.

So i guess ill be happy if i get it by xmas.
Bit tougher here in sunny SA.

Your problem is that short magazine, 2.260". Don't worry about cartridge overall length because any bullet seated to your magazine will be jumping to the lands, just a matter of how much. A lot or a whole lot. My 223AI reamer has no freebore, you can't get any less than that. Cartridge length with a 53VMax seated to the lands of a fresh chamber is 2.330". So even with a zero freebore chamber you'd have to seat the bullet way shorter than that to fit the magazine. The old Sierra Blitz 50 seated to the lands is2.265", the 55 is 2.285"......good bullets and accurate, I shot a ton of them, but without the high BC of plastic tipped bullets. Every bullet I tried from 50gr to 60gr, seated to the lands, made a cartridge too long or way too long for that magazine.
Just have your gunsmith cut a chamber with NO freebore, none.


I don’t believe you got what you ordered. There’s no telling what the freebore was when I bought my first CZ new, but it sure as heck wasn’t 0, and I could jam anything I wanted.

Again, I’m not doubting you, but I don’t think that reamer could possibly be a zero freebore if you can’t touch at 2.300.

Or, maybe that 53 vmax is just that sleek.... I don’t know. I bought one box when they first came out and had some very strange shots like 3” out of otherwise fantastic groups so I never bought more. I don’t remember anything else about that bullet.
 
I had a pretty recent production CZ Euro varmint and I could touch the rifling with just about everything also and still fit the mag. Seems by now someone with a CZ 223 would have measured the mag and give an accurate measurement. Mines gone or I would. My log book had a 55 BlitzKing at 2.290 touching and a 69 SMK at 2.285.
 
Originally Posted By: CZ527Originally Posted By: AckmanOriginally Posted By: Stan da ManThanks for your advice.
Called my gunsmith today and told him to make a dummy round with the 53gr V-Max and cut the freebore to suit that bullet.
I emailed Claw bullets of our local manufacturers and asked about options for heavier bullets. He told me he makes a bonded 70gr flat base round nose bullet that should work nicely. But he said he'll ship me a couple of different weights to test them first.
Now the long wait.

So i guess ill be happy if i get it by xmas.
Bit tougher here in sunny SA.

Your problem is that short magazine, 2.260". Don't worry about cartridge overall length because any bullet seated to your magazine will be jumping to the lands, just a matter of how much. A lot or a whole lot. My 223AI reamer has no freebore, you can't get any less than that. Cartridge length with a 53VMax seated to the lands of a fresh chamber is 2.330". So even with a zero freebore chamber you'd have to seat the bullet way shorter than that to fit the magazine. The old Sierra Blitz 50 seated to the lands is2.265", the 55 is 2.285"......good bullets and accurate, I shot a ton of them, but without the high BC of plastic tipped bullets. Every bullet I tried from 50gr to 60gr, seated to the lands, made a cartridge too long or way too long for that magazine.
Just have your gunsmith cut a chamber with NO freebore, none.


I don’t believe you got what you ordered. There’s no telling what the freebore was when I bought my first CZ new, but it sure as heck wasn’t 0, and I could jam anything I wanted.

Again, I’m not doubting you, but I don’t think that reamer could possibly be a zero freebore if you can’t touch at 2.300.

Or, maybe that 53 vmax is just that sleek.... I don’t know. I bought one box when they first came out and had some very strange shots like 3” out of otherwise fantastic groups so I never bought more. I don’t remember anything else about that bullet.

The 53 is sleek. About the same as a 50 TNT which actually makes for a longer COAL when seated to the lands. Get your calipers, and ogive gauge, and start measuring this stuff. It can get interesting.

The reamer definitely has 0 freebore. I use a window gauge and can easily see this stuff. About an inch of the barrel chambered with the shoulder and neck, then about 120 degree pie shaped slot milled lengthwise (the "window"). The neck and throat area plainly visible. It's used with a split neck case. Good for getting seating depth on a new chamber and then later checking throat wear. One of these should come with every new barrel chamber job.
 
Originally Posted By: Stan da ManMeasured the mag.
Metal to metal is 2.338

The 2.260" you posted seemed awful short. If this is a true accurate measurement of the magazine inside length, then you're ok. You'll want to allow for at least .005" wiggle room in there.
 
Originally Posted By: AckmanOriginally Posted By: Stan da ManMeasured the mag.
Metal to metal is 2.338

The 2.260" you posted seemed awful short. If this is a true accurate measurement of the magazine inside length, then you're ok. You'll want to allow for at least .005" wiggle room in there.


I just measured the inside length of the mag on my CZ 527 204, which I'm sure are the same mags CZ uses with the 223, it also measured 2.338.

My 223AI is built on a Rem 700 and has a 9tw so it was throated a bit longer but I pretty much shoot the 53gr Vmax exclusively in it and with that bullet seated 5 thou off the OAl is 2.360.

I've shot some of the Hornady Superformance 53gr Vamx factory ammo in my 223AI and that stuff is jumping the bullet a longggggggggg ways and it actually shot some of the best groups my gun has ever shot. These little 53gr Vmax bullets kind of remind me of the old Berger VLD's, they either like to be really close, or jumped a long way.

I have pretty much only ever used Benchmark but I'm thinking about working up a new load with H322 because I think it will possibly give me a little more speed and H322 has always been known to shoot well.
 
I was told to load 2mm less tan mag length to prevent feeding issues
So if the mag is 2.338 what qould be the longest oal youll use in that mag??
And if i can load bullets longer would the 1:8 not make more sense or is it still a bit short for the longer heavier bullets
 
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Originally Posted By: Stan da ManI was told to load 2mm less tan mag length to prevent feeding issues
So if the mag is 2.338 what qould be the longest oal youll use in that mag??
And if i can load bullets longer would the 1:8 not make more sense or is it still a bit short for the longer heavier bullets

Remember the bullet to rifling relationship is what matters, so long as it'll fit the magazine. I don't think in terms of metric, but 2mm would be plenty. Actually .005" is very tight, probably .020" would be a better minimum. It does have to fit without any chance of hanging up. But I never come near that close so it's not a factor. And I don't shoot heavy bullets, 55's are about the most in a .223 case so tight twist isn't a factor either. Most of my .223's are 14 twist and used with 50's, but even the 55 Blitzking is very accurate. Tightest I have is a 10 twist. If you'll be shooting jackals, they're not very big and a 53 or 55 would be plenty enough.

Some people like the option of shooting all different weight bullets, but I wonder. I've always found a good accurate load and stuck with it. My small-cased guns are for small stuff up to rockchuck size. For different purposes I use a different gun.
 
Originally Posted By: Stan da ManI was told to load 2mm less tan mag length to prevent feeding issues


I think that you were told right. When I was using the factory magazine in my .223 CZ I've had some reloads using a polymer tip bullet that seemingly fit just fine in the magazine but would drag just a tiny bit at times when trying to feed back out. When I screw in the seating stem a half turn more the problem went away.

I have three 527's and only my .17 Hornet do I ever use the magazine in. My .221 and my .223 use a Calhoon single shot follower so no more issues with a bullet loaded too long.
 
Originally Posted By: Rustydust
I have three 527's and only my .17 Hornet do I ever use the magazine in. My .221 and my .223 use a Calhoon single shot follower so no more issues with a bullet loaded too long.

Leave it up to you to be different!
lol.gif


Most people use the single shot follower in their 17 Hornet, mostly because they usually feed ehh just ok at best, and mag feed with their 204's and 223's.
 
Originally Posted By: B23Originally Posted By: Rustydust
I have three 527's and only my .17 Hornet do I ever use the magazine in. My .221 and my .223 use a Calhoon single shot follower so no more issues with a bullet loaded too long.

Leave it up to you to be different!
lol.gif


Most people use the single shot follower in their 17 Hornet, mostly because they usually feed ehh just ok at best, and mag feed with their 204's and 223's.

Never a feeding issue with my little .17 Hornet. I may have had a stutter or two when I first bought it but dont remember.

Really, I like the looks of the guns without those uglyass magazines sticking out of them. I may get around to buying Calhoon follower for the little .17 too in the future. Not too concerned about it. It works fine with the factory mag and no worries about seating a bullet too far out.
 
Originally Posted By: AckmanOriginally Posted By: CZ527Originally Posted By: AckmanOriginally Posted By: Stan da ManThanks for your advice.
Called my gunsmith today and told him to make a dummy round with the 53gr V-Max and cut the freebore to suit that bullet.
I emailed Claw bullets of our local manufacturers and asked about options for heavier bullets. He told me he makes a bonded 70gr flat base round nose bullet that should work nicely. But he said he'll ship me a couple of different weights to test them first.
Now the long wait.

So i guess ill be happy if i get it by xmas.
Bit tougher here in sunny SA.

Your problem is that short magazine, 2.260". Don't worry about cartridge overall length because any bullet seated to your magazine will be jumping to the lands, just a matter of how much. A lot or a whole lot. My 223AI reamer has no freebore, you can't get any less than that. Cartridge length with a 53VMax seated to the lands of a fresh chamber is 2.330". So even with a zero freebore chamber you'd have to seat the bullet way shorter than that to fit the magazine. The old Sierra Blitz 50 seated to the lands is2.265", the 55 is 2.285"......good bullets and accurate, I shot a ton of them, but without the high BC of plastic tipped bullets. Every bullet I tried from 50gr to 60gr, seated to the lands, made a cartridge too long or way too long for that magazine.
Just have your gunsmith cut a chamber with NO freebore, none.


I don’t believe you got what you ordered. There’s no telling what the freebore was when I bought my first CZ new, but it sure as heck wasn’t 0, and I could jam anything I wanted.

Again, I’m not doubting you, but I don’t think that reamer could possibly be a zero freebore if you can’t touch at 2.300.

Or, maybe that 53 vmax is just that sleek.... I don’t know. I bought one box when they first came out and had some very strange shots like 3” out of otherwise fantastic groups so I never bought more. I don’t remember anything else about that bullet.

The 53 is sleek. About the same as a 50 TNT which actually makes for a longer COAL when seated to the lands. Get your calipers, and ogive gauge, and start measuring this stuff. It can get interesting.

The reamer definitely has 0 freebore. I use a window gauge and can easily see this stuff. About an inch of the barrel chambered with the shoulder and neck, then about 120 degree pie shaped slot milled lengthwise (the "window"). The neck and throat area plainly visible. It's used with a split neck case. Good for getting seating depth on a new chamber and then later checking throat wear. One of these should come with every new barrel chamber job.

I’m sure my Bob Green bullet comparators are wrong....

About the stub gauge, I used to have one cut with every barrel, but given the fact that within a month they’re not useful for anything but tracking throat erosion I quit the habit.
 
I shot some prairie dogs recently with a guy that had a .223AI in 10 twist. He was shooting a 60gr class bullet, I don't recall which.

My .223AI is an 8 twist, and I'm shooting 80gr bergers. He missed a lot more than I did, and his wind requirements at distance were drastically worse than mine.

If I want to shoot 50gr bullets in my 8 twist, I can do it without a problem. Accuracy and velocity are both there. Yet if I want to shoot heavy bullets, I can. I think it's foolish to go with a 10 twist when you lose nothing practical by going to an 8. The heavy bullets allow that cartridge to really reach out there.

The same logic applies for a 22-250.
 


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