Ballard rifling versus microgroove. What's the practical difference?


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epijunkie67
March 7, 2006, 02:53 PM
Just what the headline asks. What, if any, is the difference between Ballard rifling and microgroove rifling? Should I care? Should I clean differently?

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Brian Williams
March 7, 2006, 03:06 PM
Ballard is a deeper and more likely cut rifling with 2 to 6 grooves, and micro groove is shallower and 8 to 12 grooves. Micro groove works well with hardcast lead or jacketed and the ballard is better with lead. BUT, many folks have used Lead with microgroove and it works fine. YMMV

JNewell
March 7, 2006, 03:17 PM
Agreeing with Brian, I think you'll find a couple of articles on this on the Beartooth Bullets website. Funky bore diameters and oddball twist rates are probably as big a factor for accuracy.

Jacobus Rex
March 7, 2006, 03:26 PM
I've not seen a real difference in practical terms.

However, I think that twist rate is often overlooked. In some guns like AR's it can make a lot of difference.

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