Obermeyer Approved 5-R™ Style Rifling Now Available!

(please see description below)

Thanks to approval by Boots Obermeyer, Krieger Barrels, Inc. is now offering the true Obermeyer 5-R™ rifling pattern as an option on limited calibers with our barrels.

At this time we are limiting the 5-R™ option to the calibers listed below, but may offer others in the future as greater demand arises.

Please note: We are not currently, and have no future plans to offer 5-R™ rifling in our finished 'Gas Gun' lines of M14, M1 Garand, AR-15, and AR-10 variants.

5-R™ rifling is ONLY available in standard bore/groove dimensions listed and standard twist rates (**) at this time. Please call if you have questions about availability of a certain caliber/twist combination.

There is a $30.00 up-charge to the base cost of the barrel for 5-R™ rifling.

Currently available calibers with 5-R™ rifling:

6mm (.236" & .237" bore diameters, .243" groove)

** NO twist slower than 1-9 for 6mm barrels are available. Good authority has shown that short, light, 6mm bullets do not perform well in most 5-R™ barrels. We have no knowledge as to why, but do not want to risk an inacurate Krieger Barrel being on the market.

6.5mm (.256" bore, .264" groove)

7mm (.277" bore, .284" groove)

.30T Palma (.298" bore & .3065", .3070" & .3075" groove diameters)

.308 cal (.300" bore, .308" groove)

Description of 5-R™ rifling:

(We hope to have a line drawing comparison of the two styles up here soon for a better visual aid in describing  this.)

The Obermeyer 5-R™ style rifling is simply a different style of rifling that has a 'ramped' or angled transition from the groove to the land and back down from the land to the next groove. Our conventional 4 groove rifling has a nearly straight side to the land. The internet is full of information describing perceived benifits to the 5-R™ rifling over conventional styles, but most of this is comparing "apples to oranges" as they are usually comparing one manufacturers "non 5-R™" to a different manufacturers "5-R™" barrels. We have honestly seen no significant diferences between the two styles of rifling when comparing our barrels. We may have better information after this shooting season is over, and once we start getting feedback from competitive shooters trying it though.

We do not expect any accuracy, barrel life, velocity, or other performance differences from our 5-R™ rifling than we do from our conventional 4 groove barrels.

Thank you, Krieger Barrels