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old roper · October 27, 2012, 09:04 AM

This is from Obermeyer site on his Palma barrels

What was the original purpose of having a tight groove diameter, and how have circumstances
changed?

The idea has long persisted that a tight groove diameter works better, particularly in a Palma rifle.
In part, this perception resulted from the past use of under-size bullets in certain Commonwealth
countries. However, all currently-manufactured Palma bullets I have checked are now .3080" or
larger, and I no longer make tight-groove .3065" barrels. I now make Palma barrels with a minimum
diameter no smaller than .3075".

http://obermeyerbarrels.com/faq.html

Here is interesting article

http://riflemansjournal.blogspot.com...d-barrels.html

October 27, 2012, 09:04 AM	#4
old roper Senior Member Join Date: June 11, 2007 Posts: 2,155	This is from Obermeyer site on his Palma barrels What was the original purpose of having a tight groove diameter, and how have circumstances changed? The idea has long persisted that a tight groove diameter works better, particularly in a Palma rifle. In part, this perception resulted from the past use of under-size bullets in certain Commonwealth countries. However, all currently-manufactured Palma bullets I have checked are now .3080" or larger, and I no longer make tight-groove .3065" barrels. I now make Palma barrels with a minimum diameter no smaller than .3075". http://obermeyerbarrels.com/faq.html Here is interesting article http://riflemansjournal.blogspot.com...d-barrels.html __________________ Semper Fi Vietnam 1965 VFW Life member NRA Life Member Last edited by old roper; October 27, 2012 at 09:10 AM.