Alliance Hobbies Discovery trigger

Mentolio

Member
Apr 22, 2015
348
15
NJ
I have a Discovery in .22 which I bought end of last January. I like the gun, and shoot it fairly well (sub 1 inch groups at 40-45 yards from a rest). It needed a barrel recrown and bypass cleanup out of the box, and shortly after purchase I did the "3 screw trigger mod." While I had the trigger group apart, I cleaned and lightly polished all the metal to metal (and metal to plastic) contact points, replaced the trigger spring with a much lighter clicker-pen spring, and even tweaked the sear spring just a little. Even with all that done, the trigger...well...still sucked. 
While noticeably lighter, and needed a lot less travel; but was still creepy, stiff, and unpredictable. Also, the trigger would dig into my finger tip. I was placing my finger all the way down, right on the point of the trigger. Not comfortable! So I saw this "Alliance Hobby" trigger online. It is made out of brass and has a much broader, smoother shape to the trigger blade (and costs around $50.00!). I watched Bill Johnson's video on YouTube. In it he goes over the installation in detail, and also speaks to the benefits of the new trigger action. 
So the new trigger arrived today...here is the old plastic trigger and clicker-pen spring compared to the new brass unit and spring:


The shape and profile of the "innards" are slightly different, and the trigger blade is OBVIOUSLY different (improved). Using a Lyman Trigger Gauge (for the first time, so my figures may not be totally accurate), My "original" trigger (with polish, lube, lighter spring, and three screw mod) showed a 5-pull average of 3lbs, 10.9oz. After the new trigger install (took about 15 minutes including some minor adjustment), I did three more 5-pull measurements. The first average was really high at 3lbs, 1.5oz. I fiddled with it a bit, as it seemed to be binding somewhat. The next two 5-pull averages were 2lbs, 14.5oz, and finally a 2lbs, 6.4oz average (a difference of 1lbs, 4.5oz?)!
While I found this pretty impressive, what is really telling is the trigger feel. I'm used to Low-end springers, so a 3+ pound pull of a trigger really wasn't that heavy to me. It was the creep/notchy pull (I attribute it to the plastic) that really made it hard to shoot my Disco accurately. This new trigger is set for a short pull, and breaks quite a bit more "crisply" than the old trigger set-up. Also, the shape and width of the trigger blade makes the pull seem not so much lighter, but so much smoother than the old plastic unit. I have only dry-fired the Disco as of now, but when I shoot it with the new trigger, I'll update with the groups I'm getting, and if there's any significant improvement. So far, so good!
 
Ok, took the Disco out for a little shooting today. The new trigger gives me that "glass rod breaking" feeling when I squeeze it. Definitely greatly improved both in feel and function. The "first stage" (spring tension only) is very light, and super short (I could lengthen it a bit, but I forgot my screwdriver). The "second stage" is crisp, short, and lighter than it used to be. Below are some pics of results from the range today:


This is an Alphabet org "Q" target that a friend of mine and I used to zero the scope on his Savage 17 HMR (a super-nice rifle!). The target was set at 100 yards. While my buddy took a brake, I lobbed a few pellets down range. A shot a five shot group, using Crosman Premier Dome 14.3 gr from the "Brown box." Group is located in the bottom left corner.

My first shot cut the grass below the target. I lined up the crosshair on the "Shoot-N-See" bullseye with no holdover. So I guestimated the holdover (wrong) at two mildots. Here is the four shot group at 100 yds. Not exactly impressive or even note worthy, till I consider any previous attempts at this range made any hits appear totally random. Also of note: these are NOT this gun's favorite pellet. Had I shot my JSB 15.89gr, the group may (or admittedly may not) have been tighter.


Here is a close-up of a fifteen-shot group at forty yards. There were one or two fliers, but the big jagged hole can easily account for twelve or more of my shots (I had also been shooting my .177 and old Crosman 160 at this target earlier, hence the many other holes). Again, not exactly what some might call stellar, but this is very consistent shooting for me. This new trigger (including three-screw mod and some polishing) really makes the Disco a lot easier to shoot than it was with the old plastic trigger. In closing: this Aliance Hobby trigger really improves the feel, comfort, and function of the Discovery. If you have a Disco, and you don't like the trigger, I suggest this bit. 
http://www.amazon.com/gp/product/B009EG75M2?psc=1&redirect=true&ref_=oh_aui_detailpage_o01_s00