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.