The faster-than-BR 6’s such as your gunsmith recommends for up to 600 yd midrange, are actually so easy to load for and score masterfully with, that they are catching some flack as a category these days.
284 stalwarts point out that the immediate high level success with a 6, and yes that’s very possible at midrange when you start with a fresh barrel and enthusiasm, may make it harder to transition to a 7 or bigger for long range, or that alternating back and forth could hinder your long range shooting. IMO we can relate to a risk of getting spoiled, yes, but because we can discern that pothole, we ought to be able to steer clear of it, when we shoot our finicky guns, but then again, tobacco and casinos do flourish.
284 guys will acknowledge that 284’s shot by great shooters, will be squeezed for the win from below at midrange by a 6, often actually losing the agg to them even when there were only one or two entered, and who’s shooter, whether great or not, will have had an indisputably easier time with precise gun handling using that 22 pound 6, burned less powder and shot cheaper bullets.
If you are going to only shoot midrange, then you have the luxury of considering a 6 for all your Fclass shooting. All the 284 guys proposing the 284, - they shoot both mid and long range.
This 600 yard target is from a regular factory Rem 700 repeater short action, rebarreled 6BR, Shillen with many rounds through it, and plain old 107 SMK bullets, tipped, from a Manners Fclass stock. 16.5 pounds all in.
