I put in a Yo-Dave trigger kit for my 452 Varmint in .17hmr and it was good...but still had too much creep for me. I put a Rifle Basix trigger in it and now I am as happy as can be.
I put a Rifle Basix on my 452 also...The Yo Dave may be good, but I couldn't get over the idea of "shims" on a trigger.
