View attachment 439898
This is the offside view of a big bodied Kansas buck I shot at a few steps past 500 yards about 17 years ago. Back then I was running Hornady Heavy Mag 139 SST factory ammo thru an accurized Remington model 700 SPS in 7mm Rem Mag. With a LR Leupold 4.5-14x40 scope & the Varmint Hunter reticle my 200 yard zero allowed for quick and exact 100 yard increment holdovers to 500 yards and beyond. I still have that black rifle tucked away, unchanged except for a rattle can camo paint job. Anyway, when I finally got the rutting buck to stop by hollering at him across the canyon, I touched the shot off and he crumbled in his tracks. After making a few similar one shot kills from 375 to 580 yards with this setup, I began to compare the ballistics of the 7.08 Rem vs the 7 RemMag, utilizing the same 7 mm SST bullet in Hornadys faster loadings and discovered why the 7.08 may have become so popular, especially among western big game hunters. According to Hornady's charts the cute little 7.08 Superformance load delivers the same terminal performance at 350 yards as it's big brother does at 500, for example. The critter don't know if it got shot by a mild short action rifle cartridge or a hard hitting magnum, because the bullet acts the same way at the same speed. Now, in addition to a variety of other 7mm offerings, I also own and use several rifles chambered in the sweet little 7.08 Remington.
I do love the result of Hydrostatic Shock!
Funny, a couple of years ago I produced a chart that showed what the Army called "offset". In other words, given a particular bullet (not cartridge), say, a .308 165 grain Ballistic tip,, for example, where you would have to stand shooting a Hornady factory load of same with all .308 caliber rifles.
You infantry (army or marine) types will recall the lectures on "offset", how the .308 NATO belt feds could be up to hundreds of yards back from the ambush line, while the 5.56 belt feds should be "up close, as with the 5.56 M4s or M16s.
So what is the "offset" between a .308 and a .300 Savage, both shooting a 150 grain factory Hornady SST?
Savage: MV 2740
308: MV 3000fps.
At 100 yards the 308 has dropped to 2772 fps.
So basically the Hornady Superformance 308 gives you 100 yards of offset over the same factory's Superformance 300 Savage load.
But let's bang it up to the vaunted 300 Win Mag. Same 150 grain SST, same factory. Its performance gives you under 200 yards more setback than the 300 Savage.
Meaning that if you are shooting an animal at 800 yards with the WM 150 grain SST, yu would get the same result as shooting the 300 Savage at 600 yards.
The Magnum gives 200 yards setback over the 300 Savage.
In other words, how much closer to the target do you have to be to get the same terminal velocity?
And said yet another way, how much less stalking do you need with the 300 RM?