My First 1377 Mod Really Worked!

[Redleg]

My brand new Crosman 1377 Morning Fun Pack had a lot going for it.... I won't go into it's favorable attributes since I know I would be stating the obvious.

But, the trigger pull was terrible.... more than 5 lbs for sure.  After some thought, I got the brainstorm to see if I could dangle a 5 pound exercise weight from the trigger.  The weight turned out to be 5.2 lbs (+- 1 tenth).  A cord was tied around the weight then, I took a plastic coat hanger and after tieing the other end of the cord to the coat hanger, put the hook of the coat hanger through the trigger and lifted upward until the weight was in the air.  Then I shook the gun a bit and the trigger did not fire.  Shook harder and finally, it fired! Wow!  I knew I had to do something.

So, Google turned up a video promoted as a "Two Second Mod" and "Free" by a gent called "Mountain Storm", so I tried his mod.  So, I removed the stock and then the spring which was then over compressed merely by using finger strength.  Then, the spring returned - it was obviously a step in the right direction but the trigger was still far too stiff for my liking.  So it was time to over compress the spring again.  This time, the improvement was stunning.... To access the trigger pull beyond what felt better, I took a 3 lb exercise weight (turned out to be 3.2 lbs) and repeated the test with the coat hanger. Pow!  the gun fired just as I reckoned the weight was to be lifted from the bench.  So all that was left was to shake, slap, jar and otherwise punished the 1377 to ensure that the sear would hold safely.

In a matter of a few minutes, I wound up with a trigger pull of slightly less than 3 pounds and the be part, the size of my target groups improved instantly!

I'll likely obtain a suitable spring and redo this operation when the weather warms - until then, my 1377's trigger is greatly improved and much more useable.  I heartily recommend this very simple, quick and easy mod as a temporary fix while a more thorough trigger mod is being planned and executed.  Many thanks to Mountain Storm and the rest of the folks who expend the time and effort to share their ideas and experience with us "newbies".

[bgmcgee]

Nice. The best mods are the free ones. Look up the .22 case mod too it makes a great little spring guide. Also a little polishing of the trigger group parts contact points helps bunches and both are virtually free too.

[DavidS]

Nice. The best mods are the free ones. Look up the .22 case mod too it makes a great little spring guide. Also a little polishing of the trigger group parts contact points helps bunches and both are virtually free too.

I will second that.  Though I made a custom spring guide.

My trigger pull is around 0.3 pounds, and smooth as silk.  The travel on my trigger is less than 1/8th of an inch.

Though I did have to make a custom hammer to make it that lite .

Trigger mods are nearly free.

[Perry01]

I used a device a bought years ago that measures trigger pull weight on my 13xx when it was new and it needed almost 7 lbs to engage the sear. After compressing the trigger spring I got it down to 3 lbs. then I polished the trigger components and got it nice and smooth. I like all my guns (powder burners too) to have a trigger pull weight of around 3 lbs since none of them are bench rest match guns and are use in the field.

[DavidS]

I used a device a bought years ago that measures trigger pull weight on my 13xx when it was new and it needed almost 7 lbs to engage the sear. After compressing the trigger spring I got it down to 3 lbs. then I polished the trigger components and got it nice and smooth. I like all my guns (powder burners too) to have a trigger pull weight of around 3 lbs since none of them are bench rest match guns and are use in the field.

I can understand that.  I use mine in the field also, I just do not cock it until it is time to fire . That is I cock load a pellet, uncock, pump, and then when I am about to take aim I cock it, in that order.

I like the super low weight trigger pull on my 2289's.

[Perry01]

I can understand that.  I use mine in the field also, I just do not cock it until it is time to fire . That is I cock load a pellet, uncock, pump, and then when I am about to take aim I cock it, in that order.

I like the super low weight trigger pull on my 2289's.

That's sounds like a good sequence to follow.

I just have so many guns I forget which one I'm shooting sometimes, thus the simplicity of having them all with a similar trigger pull weight of around 3 lbs. Plus my son shoots them too and I'm afraid a super light pull weight might be unsafe, especially if he's following me in the field :-)

[F7FTIGERCAT]

One more thing you can do, is shim the trigger and sear pivots with some small washers.
This may require filing the frame, sear and the trigger to get the fit right, then some light grease,  a little work and time pays off with a trigger that has no wobble only smooth  fore and aft movement    
I also removed a turn and a half from the sear spring and added a polished 22 cartridge to the top of the spring, lubricated the contact as well.
Don't get carried away with the grease a small amount is good.  ( you may want two trim the sear spring a little at a time to get the feel you like ) and do the smack down test to be sure you didn't go TOO far
Springs are cheap so get it PURRRRRFECT.

Ed   

[Redleg]

Wow!  Thanks for all of the ideas to use when I get to work on the 1377.  This collection really puts all I need in one place for easy reference! I hope to get going on this later this week.  I want to do some baseline target shooting to help measure the improvement in shooting that hopefully will result from tuning the trigger.

I just put a Perrini 1x30 red dot sight on and want to test it some before I do any more tinkering.

BTW, I searched for Perrini Red Dot sight at Amazon.  This yielded this sight.  It is made for .22 rimfires and air guns.  Red and Green dots, uses 2032 batteries.  Works great!
Best of all, it was only $15 + $5 shipping - arrived very quickly.  Took all of 5 minutes to install.  A few more minutes to zero.  No problems.  It is made of aluminum and looks very much like the "other" 1x30 red dots I have seen for much more money.  They claim a list price of $69.  If true, it is a real deal.

I appreciate it the opportunity to take advantage of your experience with the 1377.

[TooJung2Die]

You might want to try this trigger mod. It combines the advantages of the .22 brass spring guide with the feel of having a trigger stop. Cost is nothing if you already have these common items in your odds and ends. All you need is the handle from an acid brush, a common nail and a softer spring. Make the nail just long enough to allow the sear to release the hammer. Polish all metal to metal surfaces.