So.....lets just say you take a family member or a friend. You are essentially an unpaid guide. Your family member or friend flinches when squeezing off his 30-06 or .300 WM? Too much rifle for the shooter. Whatya gonna do then? There is a reason people stepped down from too much power. Is a 30-06 going to give you a faster follow up shot? Once again, there are a lot of studies it doesn't. That's why it may be the standard, but it went away almost entirely in the military. Hit's are more important than high energy misses.
I'm not going to get into a debate on which cartridges are best suited for new hunters other than to say I do believe in a gradual progression rather than immediately jumping into the biggest, most powerful cartridge you can find.
As for recoil, I hate to break it to you but that's part of the big game experience. If you want a cartridge that can reliably take the full spectrum of North American big game (or big game on other continents), then you should expect a bit more recoil than what you get out of your average deer rifle. You can't have your cake and eat it too. If you want to go with a smaller, lower recoil cartridge (like 6.5 cm) for tackling bigger game, that's your choice, but you are making some sacrifices when you switch to that cartridge.
I know you're gonna hate this but I have a friend who's shot twelve elk with a .243.
I don't hate that, rather I think it's funny that you started off this conversation by declaring that you don't care what the guiding community thinks in terms of cartridge selection; you even went so far as to imply that most of the hunting community is somehow out of the loop when it comes to newer cartridges, like 6.5 cm. Yet now you've come full circle and you're relying on other hunters' anecdotal big buck stories to prove your point. Kudos to your friend, if he exists and has in fact taken that many elk; most in the hunting community do not use .243 for such purposes.
I hesitate to stick my head above the parapet in this debate, but the two main calibres I've used for hunting deer and antelope of all sizes, over the last 42 years, have been 6.5mm and .308, and I think there is one angle that hasn't really been mentioned - which is penetration.
Most African Professional Hunters will tell you that what kills game is 'bullet placement' and 'penetration', and it's that combination of low recoil (making accurate shooting easy) alongside very high sectional density, that makes the 6.5mm bullets (of whatever cartridge) not just adequate - but deadly.
6.5mm bullets have 36% higher sectional density than .308s. That means for a given weight of bullet or energy, they will penetrate deeper.
For example, I think most people would accept that a 180gr 30-06 would be effective on an Elk at 400 yards, and at that range Hornady's classic 180gr SP Interlock retains around 1475 ft lbs.
But, Hornady's 6.5 Creedmoor 143gr ELDX has exactly the same energy at 400 yards (1475 ft lbs), along with a sectional density equivalent to a 195gr .308 bullet - and with 20% less recoil.
In practice, I hardly ever find my 6.5mm bullets in the animals I shoot, because they exit.
It isn't about bullet weight, or momentum, or frontal area. It's about penetration.
1) Have you actually done field tests comparing the penetrating capabilities of the two (6.5 and .308)? There is a fellow over at Terminal Ballistics Research who has done tests and his conclusion was the 6.5x55 (which some here claim is comparable to the 6.5 cm) has mediocre penetration and wounding characteristics on large-bodied animals at longer distances.
2) Sectional density is but one of several factors in a bullet's overall lethality. 6.5 cm is noticeably down on energy and momentum (the latter especially dictates how well a bullet pushes through resisting mass) compared to more traditional .30 caliber cartridges (.308 and .30-06).
3) You bring up African Professional hunters to reinforce your points on shot placement and penetration. I don't doubt the relevance of those two topics. I do doubt that you'd find many, if any, guides over there recommending 6.5 cm as a suitable, all-around cartridge for the various big game found on that continent.
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