Quote:
Originally Posted by Kurt505
For a fair comparison I compared a 280rem with a 160gr partition to a 30-06 with a 165gr partition, both being same size case and within 5gr of projectile weight. The 30-06 starts out at 2800fps, at 500yds it is going 1799fps. 280rem starts out at 2775fps, at 500yds it's going 1901fps. At muzzle the 30-06 has 2872ft/lbs energy, at 500yds it has 1186ft/lbs of energy. 280rem at muzzle has 2735ft/lbs energy, at 500yds it has 1284ft/lbs of energy, with just over 2" less drop and less recoil.
I did an apples to apples with a 308 based case between a 30cal and a 6.5 cal, 6.5cal wins, this is an apples to apples comparison with a 06 based case between a 30cal and a 7mm.
Unless you purposely stack the odds, the 6.5 and 7's flat out out perform the 30cal bullets with less recoil.
Will the 30cal get the job done? Most certainly. But there are more efficient options.
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There are more efficient ctdgs ,depending on your definition of efficiency.
If recoil enters the equation, all bets are off. Recoil is a shooter thing and has nothing to do with cartridge performance.
Your are doing a trajectory comparison, not a "best performance" comparison. If you want the max out of a 7mm bullet, use a heaviest 180 VLD bullet available and put a 7mm STW or a7RUM behind it. Do the same with a .30 cal 210 VLD bullet using a .308 Norma or .300 WBY. All loaded to MAP. This is the absolute Max for the three cartridges using the heaviest payloads they can pack. Now, do the same with the 6.5 using the 140 VLD (heaviest available).. Use a nominal hunting range of 300 yds and let 'em rip on your software. Increase the ranges from there.
I don't know the outcome but I do know SD will play a major role in the energy dept.