My dad started us kids off shooting his Browning BAR in 7 Mag in the late 60's with 160g Sierra BTSP with 61g of IMR 4831, one shot bang flops were normal. As we got older, we got our own 7 Mags and shot the 160g Sierra BTSP. Between us,we killed several hundred deer. I don't know of a deer that ran off...quite a testimony of a caliber and bullet.
Later on, I got bored of the 160g Sierra's and went to the 140g Nosler BT with 65.0-65.5g of IMR 4350 at 3250 fps. This load is flatter shooting than the IMr 4831 load with the 160g's, but deer will usually travel 35 yards or so unless shot through the shoulders.
The 175's were really accurate in one rifle that I had, I would think that they are more of an elk bullet than the 160g Sptbt. The Sierra 160g HPBT is tougher bullet than the BTSP.
Hope this helps!
Last edited by keith; 11/05/09.
