Here's one for the ultra-accuracy bunnies here. Putting all prejudice and preconceived notions to one side, is there any practical difference in the accuracy of chambers cut with a solid pilot reamer or a live pilot reamer? Bear in mind that this is not going to be a bench rest/long-range rifle, and will have a SAAMI-spec 7.62 x 39 chamber on a .300"-.308" barrel, so is likely to do no more than one MOA tops, more likely 1.5-2. Here is the "received wisdom" from the bench rest lot so far: Live pilots are better, even though there is one more place for play in the system solid pilots can scratch the lands (this I find unlikely, though not impossible) some people swear by solid pilots although they are the minority My thoughts are that it won't make the blindest bit of practical difference in my case, particularly as the portion just before the lead has to measure 0.3138 so as to accept .311 bullets (although the rifle will probably only ever fire one, and that will be its proof round.) The thought of a custom reamer specified exclusively for .308 bullets has crossed my mind, but then would the proof house call it a wildcat and stamp it with something other than 7.62 x 39, landing me in a world of hurt back in the Netherlands?