Zero and MPBR ranges are identical. The .270 has a 6” advantage in drop while the 7mm RM has a 0.7” advantage in drift. Given the closeness in the drift
, I’d say the advantage goes to the .270 Win. The 7mm RM has an insignificant 18fps advantage in retained velocity and a 224fpe advantage. Advantage 7mm RM,
but given that the .270’s 2209fps and 1626fpe @ 600 is adequate for anything Daughter #1 is going to be doing in the foreseeable future, the extra 18fps and 224fpe
are pretty much a “don’t care”.
since 168 LRAB 2900mv already has either equal or excess of what you require in certain values,
why did you ramp up 168 LRAB to 3047mv in you first 600yd ballistic comparison?..why push it that hard?
The .270 has a 6” advantage in drop
.270 Win, 150g LRAB @ .591 BC, 7000 ft altitude MPBR zero for 6” target, 600 yards, 2910fps MV:
253 yds = zero point
47.1" = drop
7mm RM, 168g LRAB @ .616 B.C., 7000 ft altitude MPBR zero for 6” target, 600 yards, 2900fps MV:
253 yds = zero point
53.1" = drop
Ive tried a number of ballistic calculators and cannot find one that gives 150 LRAB( .591)2910mv anything like a 6" drop advantage over 168 LRAB(.616)2900mv
7000ft alt. / 253 yd zero:
no matter which program I use, both results come out very close to each other.
150 LRAB - 53.07" 600yd
168 LRAB -52.91" 600yd
Its illogical in physics that a lower B.C. projectile would have (6") less drop than a higher B.C. projectile, when launched at virtually
the same MV and with same zero point.
