Oct 3, 2011 · "There are six reasons for guns to turn "plum". First is the temperature of the bluing salts, which must be maintained at exactly 292 deg F. If the temperature is lower, bluing won't …

Nov 21, 2006 · Did this occur on any of the Ruger DA models (Security Six, Speed Six & Service Six)? The reason for asking is I saw a Speed Six (prefix 156) with the plum colored frame …

Jun 27, 2013 · Ruger now uses an additive in their bluing tanks that prevent plum coloring. Brownell's sells it as "S" additive. BTW, you rarely see plum barrels because they are a …

Nov 16, 2011 · There's a long thread about the reason for the plum color you may want to pull up for a full discussion. Basically it's slight differences in the alloy of the metal. Guns do not …

Oct 26, 2022 · I've noticed that some refer to their Ruger metal as "turning plum". Does the plum effect increase over time or is it set when the gun is blued? I suspect it's the latter.

Apr 9, 2013 · Ruger cylinders are also cast but with a different alloy than frames, however even some of these turn plum ... just not as often. I suspect plum cylinders are a result of bluing …

Jul 16, 2012 · I have a SBH and BH made in 73 and 80, they both have the "plum" coloring to their bluing and I like it. What do others think of the plum?