Re: Looking for Opinons! good and bad
Improves performance from what to what? My preference is for folks who guarantee a certain level of performance in a meaningful way, namely will this set up produce .5 moa, and is this claim something the builder stands behind.
When someone speaks to me in marketing terms I get anxious, "dramatically improves accuracy" from what to what.
Modern barrel making is pretty good, routine firelapping is not only non productive it will eliminate any help your likely to get from the barrel maker should you get the odd bad one.
I'll repeat the advice, checkout other options beginning with Len's at the top of the page, and moving through the guys that sponsor here, the extra time at worst gives you a better handle on communicating with whoever your working with now.
To this point in the conversation, at the very least you're not representing this smith very well, and at worst you could be setting yourself up for real disappointment.