So here's the deal, i'm lining up parts for a decent SPR upper build and I'm kinda stuck on what barrel I want to use. I'm looking at 18" Stainless Steel, threaded. I've been looking at Rainier Arms Ultra Match -> Rainier Arms UltraMatch .223 Wylde Barrel - 18 SPR | Rainier Arms or the JP Enterprises -> JP Rifles I believe the JP is higher quality than the Rainier, but I might not need that extra quality. Do you guys think the Rainier Arms barrel is good enough for >600yds shooting. Should I go the extra $$ and get a better quality barrel? Thanks in advance.