It also gives the attractive black lettering on the perfectly ground surface. They are then re-ground again and the OD is held within 0.001 diameter, straightness and roundness. The parts then go to Melonite to surface harden, make slick and black. ![]() The threads and face are then put in and engraved. ![]() We then heat treat the parts, stress relieve them and then GRIND the OD to the ID. At that point some of the machining happens. We gun drill, pull ream with barrel type bore reamers and OD turn the blanks to an oversize dimension. We start with the finest stress relieved 416R steel. The processes and steps that occur in the manufacture of these are bordering on being ridiculous. No stone was left unturned for this line of actions. The Stiller Precision Rimfire Actions 2500X actions are Stiller Precision Rimfire’s attempt at perfection.
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