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My 39A my dad gave me when I was a kid is a nail driver

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Since I started dabbling with 39A's and trying to learn as much as I can, one thing I've learned is that some are more accurate than others, and there is no conclusive evidence that either microgroove or traditonal Ballard rifled .22 barrels are more accurate than the other.

Sounds like you are fortunate in having a good one.

Paul



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Originally Posted by Paul39
Since I started dabbling with 39A's and trying to learn as much as I can, one thing I've learned is that some are more accurate than others, and there is no conclusive evidence that either microgroove or traditonal Ballard rifled .22 barrels are more accurate than the other.

Sounds like you are fortunate in having a good one.

Paul



I agree. I've found Marlin microgroove barrels no more accurate on average than other rifles within the same price range. They're normally less accurate than many higher dollar rifles, but I'd expect that considering the price difference.

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The one I have has always been a tack driver - and I've heard others say the same about theres-

What your saying makes more sense to me than micro grooves being more accurate than other types or rifling

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Originally Posted by Timbo
I agree. I've found Marlin microgroove barrels no more accurate on average than other rifles within the same price range. They're normally less accurate than many higher dollar rifles, but I'd expect that considering the price difference.

Not only the price difference, but inherent in the respective designs. Sort of apples to oranges to compare any lever action rifle to a high dollar .22 which is almost assuredly a bolt action with a precision barrel and chamber, or maybe a vintage single shot. Nobody is going to try to make a benchrest rifle out of a lever action.

That said, I am still trying to ferret out the realistic accuracy limits and parameters of lever actions, primarily in my recent interest in lever rifle silhouette. It's pretty elusive, since most reports are in the context of hunting. "My ___.22 is really accurate, can hit a squirrel in the head every time".

Paul


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I am not sure that micro-groove barrels are more accurate. I AM sure however that they are cheaper to produce than deeper rifling.

Marlin talked up less bullet deformation with the shallower grooves. But anyone who has ever run an old BRNO or even the new CZ 45Xs knows how accurate deep rifling on a 22 rimfire can be.


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With the exception of Marlin's marketing department back in the day, I don't know that anybody says they are more accurate than conventional rifled barrels, but some say that they are less so. From what I can gather, neither is better than the other when it comes to .22s.

Larger chamberings are a different matter.

Paul


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The four aspects that I find contributing most to the accuracy department are: 1. brand/batch of ammo, 2. chamber dimensions, 3. headspacing, and 4. scope parallax.

Last edited by 1minute; 12/13/12.

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5. The shooter.

.22 rifles are inherently easy to shoot and after a shooter settles in with one can usually produce good groups.

My experience with microgroove barrels is they seem to wipe out cleaner after a similar amount of shots making me think the smaller rifling retains less residue and fouling than the wider spaced ballard rifling.

Interestingly my old Remington 572 likes the cheaper CCI minimag ammo over the greentag, it isn't microgroove of course, but it seems to shoot the cheap stuff better. I have been shooting this rifle since childhood and quite often so I would know...

I have never really seen a bad batch of .22 ammo.

A rifle like what it likes....

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The key to accuracy is consistent diameter of the bore all the way down the tube, and a precisely cut chamber. Get either of these wrong, and you�ll have a frustrating rifle barrel. Get both right, and even a well pitted bore can shoot lights out.

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Originally Posted by KevinGibson
The key to accuracy is consistent diameter of the bore all the way down the tube, and a precisely cut chamber. Get either of these wrong, and you�ll have a frustrating rifle barrel. Get both right, and even a well pitted bore can shoot lights out.


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