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Dfariswheel · March 16, 2007, 07:14 PM

The Micro-Groove rifling seems to be at it's best in .22LR rifles, while the Ballard-type works better in larger caliber rifles shot with lead bullets.

For this reason, Marlin recently changed it's larger caliber rifles for lead bullets to Ballard type, but still use the Micro-Groove for the .22LR rifles.

Apparently, the much narrower Micro-Groove rifling doesn't grip larger lead bullets as well as the .22LR, and accuracy isn't what it could be.

March 16, 2007, 07:14 PM	#4
Dfariswheel Senior Member Join Date: May 4, 2001 Posts: 7,478	The Micro-Groove rifling seems to be at it's best in .22LR rifles, while the Ballard-type works better in larger caliber rifles shot with lead bullets. For this reason, Marlin recently changed it's larger caliber rifles for lead bullets to Ballard type, but still use the Micro-Groove for the .22LR rifles. Apparently, the much narrower Micro-Groove rifling doesn't grip larger lead bullets as well as the .22LR, and accuracy isn't what it could be.