it can be interesting to compare sectional densities of 7mm bullets and 30 cal.
120 gn 7mm is a little less, but similar to 150 gn 308.
7mm 140 gn is almost spot on 165 gn 308.
7mm 150 gn is a bit less than 180 gn 308.
7mm 160 gn is similar to 190 gn 308.
7mm 175 gn is a bit more than 200 gn 308.
take this for what it is worth, but using bullets of similar construction would suggest similar performance terminally.
b.c of 7mm bullets of the same s.d as the 30 cal is a bit higher, allowing them to hang on a bit more.
and 7mm recoil is a bit less. (for similar velocities.)
we tend to think we need controlled expansion for all shooting, but something like the sierra 140 gn is a surprisingly effective bullet on smaller deer species and pigs in the 280.
it can fail in the 7mm stw.
bruce.