I bought a CZ 452 off a feller on here 2 years ago. Took it to the range and it shot like this.
Have not done anything with it since but I pulled it out and scrubbed the heck out of the bore last weekend and might go shoot it Saturday with all the ammo types I can get locally.
E: clearly this is appalling precision, my Q above is looking to see if 10xrd 1.5 moa is a normal and realistic expectation, or is it 10xrd 3moa, to know when I've got it "sorted"
Nah the scope is a Leupold mk4, it's good.
I can only surmise fouling as the crown looks good and the bore looks OK as far as I can see, like not visibly gouged
The 17hmr can copper foul if not cleaned with boretech eliminator or other effective coooer remover
It needs to stain the patches blue with removed copper so you know when it’s clean
A big fast bullet beats a little fast bullet every time
had a marlin heavy barrel, shot like a laser.
Too loud without a suppressor.
useless in anything above 5kmh cross winds. Calm evenings deadly out to 200m.
Too expensive to shoot when I could use my 223 with 50gr pills out to longer distances, reload and buck the wind.
Your ammo that’s not concentric, ie bent, not assembled straight , will be the source of the random fliers
This problem surfaced in 2005 when the 504T was released , yes 20 years ago
They are still making 17hmr ammo today that gives you a giggle when rolled on a concentricity gauge, it’s the reason most went on to use a 223
The neck tension required to hold the projectile is ridiculously high and crimps the projectile, damaging it, and is also the reason they can’t anneal the necks, which results in split necks and causes velocity variations
The rifles are accurate, the ammo not so much
Last edited by 7mmsaum; 03-04-2025 at 09:34 PM.
A big fast bullet beats a little fast bullet every time
Iv had 3 Hmrs, an anschutz, a weihrauch and now a steyr. The Weihrauch was consistently the more accurate. The steyr is as good but a lot lighter so harder to shoot off the bench. These are 50yd 4 shot groups from the weihrauch. Overlayed they are under .5 inch and the third group I videoed for the prospective buyer fits in the same, so 12 shots hovering around MOA. Keeping in mind its a rim fire and slight wind will ruin a group at 100yds which is why Ill test at 50 unless its a rare dead calm day.
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Just a slopy retrobate
Moving to a 223 with factory ammo would be a worse problem. My 17 would group an 1” at 100, I have deleted all the targets from my photos so cannot prove. A 12 gauge hull is good at 100.
Old ammo can be a problem, I always listen to the shot as I’ve had a couple fizz and leave the projectile in the barrel, split necks are common.
Just remembered I owned a 4th, it was Sako, but not made by Sako, didn’t own it long
Boom, cough,cough,cough
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