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No. 9. M-700 X-Mark Pro Adjustable Install a Light Trigger Spring
Lighten and Smooth the NEW M-700 X-Mark Pro
Adjustable Trigger introduced by Renington in 2009.
| Picture #1 |  |
Picture #1 shows the trigger assembly, it's 2 retaining pins, and the broken safety lever.
First, I must say that it is not necessary to remove the trigger assembly from the action in order to replace the weight
of pull spring. However, if someone decides to remove the trigger assembly for cleaning or for any other reason, I
should show you an example of something to avoid. If the rear trigger retaining pin is driven out from the wrong direction,
and the safety is in the forward, or "Fire" position, the safety lever can be broken off
| Picture
#2 |  |
Picture #2 shows the rear trigger retaining pin protruding slightly above the flat side of the trigger housing.
Just imagine where an unbroken safety lever would be at this point. If the pin is driven out, toward the lever, the
lever will be broken.
| Picture
#3 |  |
In the trigger on the right, the safety lever has been pulled to the rear, and into the "Safe"
position. This will provide clearance for the pin to pass by, even when driven out from the wrong direction. Better
yet, drive the pins out the other way.
The ends of my trigger alignment pins are also visible
in this trigger on the right. These pins provide an easy way of maintaining alignment of the sear and sear spring as
you re-install the trigger assembly back into the receiver.
| Picture #4 |  |
This New X-Mark Pro Adjustable trigger assembly, introduced in 2009, has two
trigger weight of pull springs. When the trigger is pulled, both of these springs are compressed. Either one
of these springs, by itself, is capable of creating a heavier weight of pull than most of us would prefer.
The starting weight of pull for this particular trigger, with factory springs and adjustments. is 4 lbs. 10 oz's.
This picture shows an allen wrench inserted into each of the two
trigger spring adjusting screws. Both of these screws will be utilized during the installation of this spring, and adjustment
of this triggers weight of pull.
This picture also illustrates
an allen wrench inserted into the sear engagement adjustment screw, this third wrench's only purpose is to make clear the
physical location of this screw.
The final trigger pull weight of
2¾ lbs. was achieved without making any adjustments to this sear engagement screw.
| Picture #5 |  |
I'll call this trigger
spring
#1, simply because it is located in the same place as the single spring in the original, or old style triggers.
This is the only spring you will need to replace.
| Picture #6 |  |
This is the new spring, ready to install. Turn the adjusting screw in until its head is flush with the
trigger housing. Use some type of sealant to prevent further movement of this screw.
In my effort to shift as much
"work" as possible to trigger spring #2, I have made this new
spring very light.
| Picture #7 |  |
Trigger spring #2 is located
under this new triggers weight of pull
adjustment screw, but cannot be easily removed or changed. Given the type of parts, and the amount of disassembly
required, I believe the best solution is to leave this spring in place. When the adjustment screw is removed as seen
in picture #4, the second trigger spring remains loosely captured within the trigger housing.
In other words,
when this adjustment screw is removed, the second trigger spring is still inside the trigger housing, but it is placing no
pressure at all on the trigger.
This adjustment screw offers one more example of where freedom and
responsibility go hand in hand.
This screw offers the freedom of some adjustability, within the "normal"
(3 lbs) hunting rifle weight of pull range. But also the responsibility to not go to far. (or too light).
| Picture #8 |  |
In this picture, the weight of pull adjustment screw has been re-installed,
and turned all the way "In". The weight of pull for this sample trigger at this point is 3 lbs. 10ozs.
This is 1 lb. lighter than the starting weight of pull.
| Picture #9 |  |
With the weight of pull screw backed out 1/2 turn, the new weight of pull
is
3 lbs. 0 ozs.
| Picture #10 |  |
By backing the weight of pull screw out a total of 3/4 turn, this trigger now has a pull weight of 2 lbs. 12 oz's.
My strong recommendation is that you not back this screw out any more than this 3/4 turn.
The most consistent weight of pull results are achieved when the trigger spring remains compressed within its normal
operating range throughout the entire movement of the trigger.
When the weight of pull screw is backed out more than 3/4 turn, the trigger spring is allowed to extend past its
normal operating length, and shot to shot weight of pull consistency is lost.
These X-Mark Pro series triggers
respond well to use. The scratchy, creepy feel goes away, they get a little lighter, and the shot to shot weight of
pull becomes much more uniform.
The use necessary to attain these benefits is quickly accomplished,
simply by dry firing the rifle. If you lubricate the nose of the striker, the cocking cam, and the back side of the
bolts locking lugs occasionally as you dry fire the rifle, you will smooth up more than just the trigger. If your rifle
is new, or nearly new, I think you will be pleasantly surprised at how much smoother and easier your rifle bolt lift, and
overall bolt operation will become. How many cycles are necessary, you ask? 200 is a nice round number that works well.
During the first 100 cycles, I suggest that you lightly lubricate 3 to 4 times. Then about each 50 dry
firing cycles after that.
With the simple installation of a spring, plus the break-in process described
above, you will have a great hunting rifle trigger.
And remember, this 2¾ lb.
weight of pull was achieved with no reduction in the factory set sear engagement.
A gunsmith who is throughly
familiar with adjusting Remington triggers, can further reduce this weight of pull with a very small adjustment of the sear
engagement.
A Review
After reading through the entire trigger spring installation process above, lets review the 3 easy steps necessary for a 2
& 3/4 lbs. to 3 lb. trigger pull.
Return to picture #4, above, and be sure that you are familiar
with the locations of trigger spring #1, and trigger spring #2.
Step #1. Replace trigger spring #1
with my light spring for Remington
M-700
X-Mark Pro Adjustable triggers.
Step #2. After being sure that the trigger spring #2 adjusting screw is
turned
all the way "In" or "Tight", turn it "Out" 3/4 turn.
Step #3. Next, complete
the "Break In" process described in picture #10.
With triggers that can be taken apart,
gunsmiths have lots of ways to lighten, smooth, and "Artificially Break them In" without actually dry firing them
for hundreds of rounds.
However, since this trigger should NOT be taken apart, our best alternative
is a combination of the old, (dry firing) and the fairly new,(moly lubricant). We can "Marry" the trigger
and the sear simply by dry firing, or we can greatly speed up this process by lubricating with molybdenum disulphide,
and then dry firing. Yes it will take some time, but it sure is simple, and the results are great.
This process will smooth the trigger pull, it will lighten the trigger pull, and most important of all, it will make
the weight of pull more uniform.
At this time, I have achieved the lightest weight of pull while using Loctite
#51048 Moly Paste lubricant which contains 65% molybdenum disulfide.
I expect that other moly based lubricants
which contain a similar percentage of moly will achieve similar results. Two other examples would be Honda Moly
60 paste # 08734-0001 and TS Moly # TS 84.
Use of one of these moly based lubricants is an important
step in this process.
No liability is expressed or
implied for damage or injury which may result from the improper installation or use of this product.
Item #2009
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