Unverified load 8659 in caliber .307 Winchester

LoadID 8659
Bullet Hornady FNSP
Bullet Weight 170 grs
Powder LeverEvolution
Powder Weight 42 grs
Primer CCI #250m
Brass Make Winchester
Barrel Length 20 (inches)
C.O.L 2.45 (inches)
Velocity 2309 fps
Group 100 yds (inches)
Submitted By jht_ms
Gun Info Marlin 336 (.307 Win conversion)
Comment 90* ambient........ES__34.0 SD__17.0 (2gr over Hornady's very conservative max load) found to be 100% reliable and safe in my rifle that can't normally take full, high pressure loads