FYI, Wal Mart carries the Win. HV stuff in 5's and 6's for around 12 bucks a box. For those loads (Fed. or Win.), I would try to squeeze em down a tad tighter, say .680-.670. I had the best luck for years with lead through my .680 Lohman Long Shot, unported tube and this year with the .670 Tru Glo Bone Collector choke. Either one will put up high 150's/mid 160's with 6's.