Well, my bud showed up today with the 457 on the adjustable Boyds adj. stock model with a 6.5 -20 Vortex.

The trigger had a lot of pre travel but was crisp afterward. Adjusted the pre travel screw to release & backed off. 2.5# My bud was ecstatic & I was glad as I wasn't in the mood for a tear down. I'm willing to play with all the adjustments & alternative springs later if he wants it.

The 457 does seem to be a step up from previous models, I might learn from it's case holder & extractor profile & fix the ejection on my 452.

The groups later, but like the 457 from what I've seen.