Here are some targets shot with my 144 LSA. I don't think it's quite as accurate as a $1000. rifle, but even my so-so shooting provided some very good groups.
I love the peeps, but my eyes are not what they used to be.
In the right hands, I think my LSA could be quite the shooter, I love it. The last two pics, the target with 4 shot rings and the close up of the one were shot at 50 yds using SK+ ammo, if you get a good one, they shoot great, and don't forget, it was me who shot these, not someone who shoots all the time in comps, the one that was out in the last photo was a called flier, would have been a really good group had I not pulled one.
The fliers were me, not the rifle.
I would try an LSA or LSB and work with it for a while, if you paid a decent price, you can easily get your money back out of it. Then if you need the edge a 540X or other expensive rifle will give you, go ahead abd get one. A good Mossberg may just surprise you. Mine likes the Wolf and SK, find the ammo it likes and get ready for some great groups. The first target was shot with CCI standard velocity, it likes the SK much better.
Do have the trigger worked, I did mine and it made a great difference. It will never be a target trigger, but if you get it done so it's lighter and breaks crisp and consistant, it helps a lot. Metal does have to be removed and the angles stoned a little, so have a professional do it if you are not 100% you can get it right and safe.
My Best, John