My 455 American wouldn't shoot worth a crap when I bought it lightly used for cheap. I suspect that's why the guy sold it. I put the 20" Varmint barrel on it and put in in the Boyds TactiCool stock and gave it the YoDave trigger kit. Still didn't shoot worth a crap. So, I bought some bronze bushings (at Lowe's, desperation setting in) sized appropriately for pillar bedding and installed them. Groups improved but nothing near what I wanted. It languished in my safe for 10 years until I got my two 457s and researched tricks to get more accuracy from them. Then I pulled the 455 out for one last try. I torqued the rear screw at 30 and the front screw at 40 inch pounds respectively and WOW! She immediately outshot both 457s with SK Long Range Match which is the ammo that all 3 prefer. The 457s will be getting pillars over the summer and then I can get serious and maybe join some friendly competitions when the weather cools some.