I began Mid-Range matches late last season using a Mossberg 308 Tactical with a Nikon M-308 scope shooting Federal Match 168 gr.. 300 yds ok, 500 yds eh, 600 yds might as well have thrown rocks. In Oct I bought a Savage Mod 12 F-T/R 308, added a Vortex HST scope. With Federal Match 175 gr out of the box sighted it in quickly on a cold wet day. The beginning of March zero'd at 100 yds 19 rounds within a half-dollar. The next weekend first match, very windy day, an 82 point improvement (533/600), though 600 still needs work. My scope parallax goes from 500 to infinity. Any thoughts/tips/suggestions- new scope? Next match is early May, and I'll be stepping up to Match 185 gr Berger's.