No experience with Jewell triggers, but I've done several others. I don't like the Timney because the ones I've seen on other rifles and the one I had wouldn't stay put. After a while, they'd develop some creep. My Rifle Basic did that once and settled down. The rebuilt Remington I had was a dream that never changed. All of these were 2 1/4, to 2 3/4 lb. triggers.
For putting up with dust and crude, nothing beats the open designs like the old, pre-64, M70 or the tang safety Ruger.
That unreliable Timney got replaced by an Alaskan Arms M70 on my custom Mauser. Now there is a nice setup. E