What vintage tasco? Old made in japan stuff is good, everything else is trash

 

made in china it says, pronghorn 4x

 

Vertical stringing, not horizontal or large round group. I'd lean towards shooter error and/or a parallax issue.

You might be holding the rifle differently on the bags, pushing the rifle harder and lighter into the bags.

If the scope is a centerfire scope then the parallax will be for a longer distance than your 30m. This can 'move' the crosshair up and down if your eye is moving up and down, meaning your head is moving up and down on different shots.

Measure the group size and add that to your Post #1.

 

paralax that bad? i have had some paralax error with centrefire before, that was only a few CM at 100.

As for group size, about 15cm vertical id say.

 

Your scope is probably most of the problem. Tasco made a LOT of junk scopes. Your can might be causing the problem if the bullets are hitting it and/or it’s off center. I’ve NEVER seen a CZ452, 455, or 457 not shoot anywhere from good to great. Your ammo is good stuff, so it’s not that. Every rimfire has a preferred brand of ammo, but they all like Norma Tac from good to great also. Start by trying a different scope. If that doesn’t solve the problem, take the can off and try shooting without it and see what happens.

 

I have 3CZ452’s, one CZ455 and one CZ457. When it comes to accuracy all are brag worthy.

 

Parallax might be that bad but group shape might also be a combination of several factors, parallax being just one.

Set the rifle on some bags so that it will sit there by itself. Put the crosshairs on a target 30m away. Without touching the rifle, look through the scope and move your head side-to-side and up and down. If the crosshairs move then there is a parallax issue, a little movement a little issue but a big movement a big issue.

Rimfire scopes are factory set for a different distance than centerfire scopes. A centerfire scope may have parallax set for 125yds but a rimfire may have the parallax set for 50yds, a 75yd difference. You mention parallax issues of a few CM's with centerfire at 100, this could also be a bit of shooter error.

The pic is too blurry to be seen clearly, some holes look a bit lopsided kinda like a tipped bullet. If you agree then the bullets may be hitting the can as it passes thru.

I would still consider shooter error to be a cause.

 

Parallax might be that bad but group shape might also be a combination of several factors, parallax being just one.

Set the rifle on some bags so that it will sit there by itself. Put the crosshairs on a target 30m away. Without touching the rifle, look through the scope and move your head side-to-side and up and down. If the crosshairs move then there is a parallax issue, a little movement a little issue but a big movement a big issue.

Rimfire scopes are factory set for a different distance than centerfire scopes. A centerfire scope may have parallax set for 125yds but a rimfire may have the parallax set for 50yds, a 75yd difference. You mention parallax issues of a few CM's with centerfire at 100, this could also be a bit of shooter error.

The pic is too blurry to be seen clearly, some holes look a bit lopsided kinda like a tipped bullet. If you agree then the bullets may be hitting the can as it passes thru.


I would still consider shooter error to be a cause.

on the centrefire it was adjustable paralax, i left it on the wrong setting, was set for 50 if i remember right.

Round holes, no signs on the can.

Shooter error is always possible, in my case maybe 5cm off at 100m with a centerfire. Might pull a flier. At 30m off bags? i dont believe it, i can grab my RPK and shoot a better group off the bipod at that range.

 

Something has to be loose for it to be that far off. Loosen the stock, loose scope mount, or something loose in the scope. Good luck.

 

Shoot the group again, keep track of each shot from cold barrel to warm barrel. I'm curious if the string grows gradually or bullets are all over the place with no pattern of hits.

 

going to try again tomorrow. I did keep track, thats 3 magazines, the scope is only boresighted. the groups went up and up. strings of 5 with a 10 minute break between mag changes. Il see what a different scope does. Seems the likely culprit, maybe it slid in the rings?

 

The barrel might be pushing off the stock's forend tip as it heats, the weight of the can can hold the barrel to the stock.

if the rifle is pushed into the bags that will worsen the issue. Bring the front sandbag closer to the action, this may take pressure off the forend tip.

 

Shooter error, loose rings, loose mount, bad optic. I've never seen that kind of dispersion at that range. I'm hoping you cleaned the bore well prior to first range session. A lot of oil and debris left in these barrels from the manufacturing process.

 

That looks like a 10 in group at 30m, right? Let’s call that 29 MOA. What can cause a 29 MOA group? I’m gonna guess bedding quality and rest usage can never do this. My guess is action bolts loose or missing and scope mount loose or broken scope are the only choices. Maybe loose barrel…..maybe.

 

Yea also figured, none of the usual suspects like bedding, shooter error etc explain this.

Iam not so arrogant ad to say i dont pull shots, or mess up eye position.

But iam no greenhorn, i dont go from shooting hare ar over 200m off a monopod to a dispersion like that at 30m from a front and back rest. Just not possible.

Seems it was the scope. It shot better today. Not to my satisfaction yet but now it looks like its ammo. They are normal looking groups like i would expect from a centerfire at 100m when trying out ammo

 

Loosen the stock screws and see if the action rocks back and forth with the front of the action as the pivot point. If it does it's a bedding problem or it could be the front a action screw is bottoming out before the stock is pulled tight into the stock.
Easy to check,if that isn't it the scope has tons of parallax as mentioned previously.

 

I wouldn’t consider anything until I tried another scope , every time I have mind boggling issues it has been scope problems.
I nearly gave up on a gun because of scopes , tried three I had sitting around and they were all junk .
Fourth one held and shot a group that was ok.

good luck.

 

I’ve used quite a few of the old Tasco Pro-Class pistol scopes and they always worked perfectly. Had one on a 375 JDJ for awhile and held up fine. Then one time I decided to gamble on a NOS Tasco, I think it was a “World Class” maybe, can’t remember. Anyway, mounted it on a 7 TCU and in short order something came loose inside the scope, Completely missed a buck at 30 yards before I knew something was wrong. Shot it on paper at 25 yards and it was off by a couple feet.
Into the trash it went.

 

it was either scope or rings.

50m with a umarex picatinny adapter and a good scope in a one piece mount (just what i have laying around)

its not amazing but within reason for what could be shooter error and bad ammo. A world difference from yesterday

 

So, today was your second day of shooting?

 

today the third. Unless you mean in general, then no, it is my first rimfire tho.

 

Why would a guy buy one of the very best expensive .22 rifles and put a cheap crappy scope on it?

 

Because i paid 150 for it and it came as a set. CZ isnt worth mutch in Finland.

Right now i am testing with a zeiss 6x. Looking into buying a hawke airmax or maybe a vixen 4-16x44 with sidefocus.

Just not looking to throw 500+ at a scope for what is essentially my plinker.

 

Ok, hawke airmax, ase utra supressor. Fully bedded from chamber to front recoil lug behind the magazine/bolt. Free floated ofcourse.

5 shots 1 hole.

seems that it neither liked that cheap can or not having a can.

with the cheap can i got those terrible strings. Without it i got mediocre groups. Ase utra can and suddenly it stacks them into a penny

 

Are the holes any rounder with the new can?

 

no but the holes in the can itself are rounder

 

Ok, in an earlier post some of those holes on the target looked tipped to me.

 

thats because i was shooting at an angled board

 

Well that's a sneaky way to shoot smaller groups.

 

Happened to have some thick styrofoam left, wouldnt stay up in the wind.

Now its shooting cheap norma tac22 inside a penny at 30m (my backyard range)

now to decide where to zero it. Normally i zero everything at 100 because iam used to it and most of my guns are similar velocity.

Ranges i will shoot at are going to be 30-100 so maybe 70m? The precision iam looking for is about 5cm max at any range. My scope has 0.5mil marking tho so i can do some holdover

 

Yea mutch better. I suspect a few things contributed. Can was a big one free floating too. Bedding, maybe.

Now i can definitely admit shooter error. This is about as good as i can stack them off bags on an outdoor range.

I think the ammo could do better but il need to familiarise myself more first. Always takes a while when i get a new rifle to get a good feel for it.

I assume thats good for a 22lr?

gusts from the left

100m range with 7x scope.

 

That will work!