WHEN ACCURACY IS YOUR MAIN REQUIREMENT:
CHOOSE A HAVERKAMP ACTION
Tom Haverkamp using an air gauge inspecting a receiver.
Each receiver is inspected for bore diameter and straightness using a Sheffield Precision Air Gauge.  This instrument is accurate to 50 millionths of an inch.
To maintain straightness, we machine all the openings in the receiver in hardened steel after heat treating.  This is difficult, as the hardness is Rockwell 41-42 C.  But, this is done to maintain the optimal tolerances accurate actions require.
 

Choice of square bolt face or cone bolt face. Sako style extractor and ejector is standard. Firing pin tip is choice of 0.062 diameter or 0.075 diameter
dual-port-rfile-action

The dual port model is designed for competetion shooters who desire the advantage of placing shots downrange quickly. It is a left load, right eject micro port.

The micro port opening measures .550 inch in height and 2.040 in length. The receiver has the same footprint as the single port. It is available is either 6PPC or .308 boltface.

It has the push (lever style) bolt release.

Receiver is polished blued finish, or in the white (illustration).