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Joined: Aug 2009
Posts: 1,752
Campfire Regular
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Campfire Regular
Joined: Aug 2009
Posts: 1,752 |
Hi all
I have this little 7x57 that's proving to be a royal pain in the ass.
It's a Brno zkk 600 barrel is in excelent condition and there really should not be a reason this rifle will not shoot 1" groups.
Koedoe, I have a Brno ZKK 600 in 7x57 and I think I could close my eyes, yank the trigger and still shoot 1 inch groups. It is the most accurate "big game" rifle I have. My suggestion would be to try IMR 4350. Yes my Brno shoots the heavies really well like the 170 Sierra RN. With 2.85-2.9 grams of IMR4350 it shoots Sierra 160s into 1/2-3/4 inch groups. I can get 1/2" groups with the 154 RN Hornady using the same powder. My deer hunting load for this year will feature 49.0-49.1 grains of IMR4350 and the 140 Partition - 5 shots group under 1 inch and I had one 3 shot group where all three shots overlapped one another. That rifle will shoot no doubt, you just need to find out what powder it likes. I couldn't hlp noticing you comment about the 170 gr. Round nose by Sierra. My Winchester M70 in 7x57 loves that bullet using W-760. (Same as H414) I supose you already know that Sierra no longer makes the 170 gr. RN (DAMMIT!)so I hope you have a decent supply. I still have a few but I'm always scrounging at the gun show looking for more. I got a few left.  I know where another 300 are as well and I doubt they have been sold as nobody wants an "old round nosed bullet". LOL ![[Linked Image]](http://i20.photobucket.com/albums/b218/BRISTECD/IMG_0384.jpg)
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Joined: Jan 2006
Posts: 5,720
Campfire Tracker
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Campfire Tracker
Joined: Jan 2006
Posts: 5,720 |
I have a Brno ZG47 and I can tell you..it only likes loong bullets.....160's have been my pick!
Come on America,
Athletes and actors are not heroes, only soldiers, airmen,marines and sailors get that respect�and let's add firemen and LEO's
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Joined: Jun 2003
Posts: 637
Campfire Regular
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Campfire Regular
Joined: Jun 2003
Posts: 637 |
I have been shooting the Hornandy 154gr RN and they appear to shoot very well also. Maybe its round nose thing?!
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Joined: Dec 2003
Posts: 5,950
Campfire Tracker
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Campfire Tracker
Joined: Dec 2003
Posts: 5,950 |
Koedoepeester,
What do you want to do with your 7x57 that cannot be done with 175 grain bullets? You said the gun shoots well with them, so why not shoot them? I do, and they work great. If its trajectory you're worried about, the 175s probably shoot flatter than you realize.
Our God reigns.
Harrumph!!!
I often use quick reply. My posts are not directed toward any specific person unless I mention them by name.
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Joined: Aug 2009
Posts: 2,794
Campfire Regular
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Campfire Regular
Joined: Aug 2009
Posts: 2,794 |
Didn't the 7x57 gain it's enviable record using 175-180gr bullets? I know a 154gr RN bullet has awsome results when you stick it in a deer.
Aim for the exit hole.
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Joined: Oct 2006
Posts: 44
Campfire Greenhorn
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Campfire Greenhorn
Joined: Oct 2006
Posts: 44 |
Hi all
I have this little 7x57 that's proving to be a royal pain in the ass.
It's a Brno zkk 600 barrel is in excelent condition and there really should not be a reason this rifle will not shoot 1" groups.
Anyhow I have neen mucking about for the past summer and tried barnes x 140gr as well as speer 145gr softs in it.
with both RL19 and H414 this rifle will very consistently shoot 1.5" groups but I cannot seem to shrink them by much past that.
Also played a little with bullet seating depth and still not much luck.
So yesterday I bought some 175gr federal RN factory ammo and the rifle shot 1" groups all [bleep] day long!
Those are too heavy for my purposes and would prefer a load that would be above 2700 fps in this gun, so probably should stay with a 140gr bullet.
I have a huge collection of 7mm bullets in all weight ranges so before I go and buy even more bullets. given the fact that I have a 1:9 twist rate, Loooooonnnnggg throat and it shoots 175gr bullets well what bullet would you suggest I try next??
Barnes X was so far the best but it chokes me to pay more than a buck for a bullet.
Thanks Koedoe I had the same problem with my ZKK 7x57, I removed the screw in the front that holds the stock. After that the 140's shot under an inch.
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Joined: Apr 2010
Posts: 56
Campfire Greenhorn
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OP
Campfire Greenhorn
Joined: Apr 2010
Posts: 56 |
I do own a Chrony and usually only use it when I have a load that is accurate, to get a better idea of how my load is performing.
I realize that the 175 trajectory is not too bad ( great-great gandpa picked tommies of at long range with 173gr bullets) But I want to shoot to 250meters with no hold over so I am going to go try these 160 gr speer softs today as soon as it stops raining (I hope) It they do not shoot, then 160 accubonds.
Barrel is free-floated and has been re-crowned by a competent smith also glass bedded the area around the front screw that holds the stock to the action.
I don't get drunk, I get awesome
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