why does plain bulk ammo shoot more accurately than expensive well made ammo?

J

JR Hartman

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with my new Norinco JW25a finally sighted in(the sights were really really off out of the box), I was able to do some nice shooting for once.

I am able to consistantly hit the bull(8 of 10 in the red and one touching it, one just off it) with Winchester SuperX, 555 box bulk ammo in 36grn hp 1260fps copper plated. Great news since when the gun came out of the box it couldn't hit the paper let alone the bull. Seriously.

However, with Stingers(3x the cost per round, clearly more well made), I can only manage 2-3 in the bull with the rest near it, but clearly worse off. All 10 are covered by about 2.5" and the cheap ammo can be covered by a toonie. if you take away the 2 crappiest ones, nearly by a quarter.

what gives?

I am not complaining, clearly cheap is great, and the whole point of this gun, but I am really curious!

oh, open sights btw, no optics at all
 
What makes you think that the Stingers are so well made?Stingers are expensive, but they certainly aren't that expensive because they are intended to be match quality ammunition. If you really want to see accurate ammunition, try SK,Lapua,Eley, or RWS. You will likely find loads by those manufacturers , that will be noticeably more accurate than the bulk ammunition.
 
Simply put, you haven't tried the expensive stuff yet!

Match ammo gets up to 15 dollars a box of 50!!!

I recommend you try some CCI Standard Velocity though. I haven't owed a rifle that didn't like it, and it's middle of the road for price.

I used to think I was doing good with 1/2 inch groups from Winchester Super X HV, until I tried some CCI SV. ;)
 
have you tried Federal bulk blue package?
ive found that most winchester ammo are unreliable, dont know if thats a bad batch in my part of the world or
just plain bad luck...

never had problem with federal on the other hand, they sound more powerful too.
 
oh, I know stingers are not super expensive, but its obviously better than bulk stuff :)

I will try some others, for sure. I have only tried those two as I have only had the rifle to the range 3 times now.

thanx :)

any specifics as to why this happens?
 
Depends on distance as well. I'm no ballistics expert but I think somewhere at the 75-100 yard mark for hyper velocity ammo, the .22 bullet is overtaken by the wake and impacts accuracy. Again, not an expert but I believe this is why all match ammo is ~1050-1080 fps which is close to the speed of sound but still subsonic. Shooting very fast stuff at longer distances will cause a loss in accuracy for this reason.

I may be off on some details but I'm confident I got the gist. Experts please feel free to correct me though!
 
Sambaru said:
Depends on distance as well. I'm no ballistics expert but I think somewhere at the 75-100 yard mark for hyper velocity ammo, the .22 bullet is overtaken by the wake and impacts accuracy. Again, not an expert but I believe this is why all match ammo is ~1050-1080 fps which is close to the speed of sound but still subsonic. Shooting very fast stuff at longer distances will cause a loss in accuracy for this reason.

I may be off on some details but I'm confident I got the gist. Experts please feel free to correct me though!
Click to expand...

I've heard something similar. If shooting long range you want to use an ammo that does not pass the speed of sound. So you want it to either stay above or stay below.. But like you said. Even hyper velocity ammo bleeds off enough to get down to the speed of sound after only 100 or so yards.
 
Stingers are not known to be particularly accurate. They are more expensive because they are made to get max velocity from the .22lr. Accurate ammunition tends to be subsonic from the muzzle as crossing the sound barrier imparts instability on the bullet. Try match ammo from Lapua, SK, RWS or Eley. It's expensive, but in a good bolt action it will give better results than bulk stuff. For your Norinco I'd just shoot whatever bulk stuff works best in your rifle.
 
You are comparing apples and oranges... think of LR ammo in three classes; Subs/Standard, HV and Hyper... compare ammos within a class. Every gun is different, different chamber tolerances, different barrel characteristics etc... you have to try different ammos and find the one that works best for you.

Number one Stingers have a longer case than most other regular LR ammos... they are far lighter and far faster... not every gun responds to those criteria. IME Stingers have not been good, to downright lousy in two dozen or so of our rimfires... I bought a brick many moons ago, and keep trying them in new guns, just outta curiosity... with the same cow-pie groups every time.

As others have said you have not even scratched the surface of testing ammo... after 35+ years in rimfire, I can give you the top five in ammo's that have worked for us... Wolfe MT & ME, SK Standard+, Eley Tenex & Match... but for good results at a cheaper price CCI SV's are tough to beat.
 
In my experience, hyper velocity velocity .22 ammo is not conducive to best accuracy. Generally speaking, standard velocity types tend to be most uniformly accurate and HV usually falls somewhere in the middle. The loose bulk packed ammo, such as the Winchester 333/555, seems to comparable in accuracy to other, more expensive plated HV types packed in 50 round boxes.
 
I would stick with standard velocity stuff. I've heard that if the bullet goes from supersonic to subsonic speeds, it can destabilize or something.
 
I have to says Stingers, if you except 2 shots out of 15 this ammo in a SR-22 is MOA...
500005.jpg
[/IMG] in certain rifles are incredible, both my SR-22 crave accuracy on them and a marmott will not survive an under 100 metres shot... JP.
 
Norinco's don't cottin' to them highfulutin types of ammo. Give 'em a steady diet of Thunderbolts, and they'll behave just fine.
 
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