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Jack O'Conner · January 4, 2013, 01:40 PM

Micro groove is a very shallow rifling and shoots best when cleaned regularily. Plain HOPPE'S products work great.

Typically, a Marlin with its 1-10 twist will stabilize the 170 grain bullet variants quite nicely. I've handloaded Hornady 180 grain round nose bullets with hand-filed flat nose for safety. They shoot amazingly tight. But my best groups come from Speer 150 grain flat nose bullets but I can't explain why this is so. I'm not an engineer. I read somewhere that FEDERAL Fusion ammo features Speer HOT-COR bullets.

Jack

January 4, 2013, 01:40 PM	#3
Jack O'Conner Senior Member Join Date: July 11, 2005 Location: Lancaster County, Pennsylvania Posts: 1,320	Micro groove is a very shallow rifling and shoots best when cleaned regularily. Plain HOPPE'S products work great. Typically, a Marlin with its 1-10 twist will stabilize the 170 grain bullet variants quite nicely. I've handloaded Hornady 180 grain round nose bullets with hand-filed flat nose for safety. They shoot amazingly tight. But my best groups come from Speer 150 grain flat nose bullets but I can't explain why this is so. I'm not an engineer. I read somewhere that FEDERAL Fusion ammo features Speer HOT-COR bullets. Jack __________________ Fire up the grill! Deer hunting IS NOT catch and release.