Quote:
Originally Posted by lclund1946
If you run the Ballistics for the 143 ELDX at 2700 fps, which is claimed by Hornady with their factory round, you will find that it has 1155 ft. lbs. energy at 600 yards. That is about 100 ft. lbs. more than either SST bullet in your calculations. It is actually about 2 ft. lbs. less than the 145 Speer BT, at 2900 fps. from a 7mm08. In this instance the 6.5 CM and the 7mm-08 are ballistically superior to a 308 with the 150 SST bullet and are ballistic twins. They do both have less recoil andI used the 7mm08, with the 145 Speer for years, and had no problems taking moose to 600 yards. I would likely take the 6.5 CM over the 7mm/08 as it would have the least amount of recoil and I can buy factory ammo for it.
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Your comparing two different bullets. and ELDX vs an SST. Which one has better BC. ELDX. So what happens when you change that SST to 155gr ELDM from the 308. Rerun your numbers. The 308 has more velocity which means it has more ftlbs. It wins when you compare the same bullet design /weight. The creedmoor would be even slower pushing a 150gr bullet. The 308 would be faster again. The extra velocity makes up for the slightly lower BC inside these ranges. It also punches a bigger hole. What will bleed faster a vessel (elk/deer) with a .264 hole, or a .308 diamter hole. There is zero argument against this.