Uhhhmm, I think it does make a bit of a difference. It really has to do with bullet deformation really. The More grooves you have the shallower they can be, which means they deform the bullet less which makes it more accurate.
Now at 100 yards you wont see this, it will be farther down the line at the 500 yard targets.
Micro groove varmint barrels will get better groups before you take into account wind than regular barrels.
They also give a bit more velocity due to their being less friction I believe. That last bit I am not so sure on so take it for what its worth.


Thanks all,
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