KV Rummer said:
The single stage of my double set trigger feels like it's about 10 lbs. This is way heavier than is comfortable for me.
Is the single stage part of this trigger adjustable?
It is not really "adjustable" however sometimes things can be done to lighten the front trigger and you need to look in two areas...the stock wood where the trigger raises up to contact the sear arm, and then the internals of the lock itself.
I've improved a few by finding that the end of the sear arm is slightly dragging on the back wall of wood, file or grind off 1/16" of the tip of the sear arm and fixed those.
The other place is when the trigger gets up to the top of its rise it sometimes starts pressing up against wood at the very moment it's trying to move the sear arm...I removed a little more wood with a dremel tool & a skinny grinder tip and improved those triggers.
Then you can disassemble the lock and using a buffer wheel & polishing compound on a dremel tool polish the sear tip to a mirror smooth surface...helps make the disengagement from the tumbler easier.
CAUTION: the first one I did I "over polished" it and spent to much time on the tip itself...atually shortened the length of the sear tip a few thousandths and it became unsafe, had to throw it away and get a new one...so just keep the polishing "on top" of the sear tip, and don't go directly against the end of it and it won't get shortened.
Also, there is a redesigned front trigger which has a raised hump on it so it contacts the sear arm earlier in its upward travel, reducing the 'slack' arc a little and giving you more power leverage earlier in the front trigger movement.
I improved the front trigger pull on all of mine from that 10-12 pound area down to the 3-4 pound range. BUT...having said that, I shoot so much year round using only the set trigger at the range that when it came time for hunting, I found that the "slack" that has to be taken up when using the front trigger caused problems because of my "habit formed" shooting style.
I'd line up on a deer and from habit gently start touching the trigger...but it wouldn't go off...and it wouldn't go off...and the clock is running...then I'd remember the 'slack'...I'd take that up then start the trigger squeeze all over again but by this time the shot opportunity was lost...so I never even try to use the front trigger...I just use the set trigger for hunting, backing out the adjusting screw another turn so it's not on such a razor edge letoff and its worked fine for years.