Quote:
Originally Posted by Freerider
Good point I shouldn't of said no longer the limiting factor reality is the human pulling the trigger has always been the limiting factor barring a small percentage that train a lot and can effectively shoot farther then rounds like the 6.5creedmore are effective to. The 6.5mm bullet isn't the problem though its how fast its going 6.5creedmore can probably push a 140gr bullet 2800fps 26nosler pushes that same bullet 3200 (a guess not super familiar with the nosler) the 26 nosler is going to be effective a hell of a lot further. Cartridge selection is all about balance their is no denying that a .30 or .338 boomer pushing a heavier bullet at the same speed or faster is more effective at further distances thats physics but those benefits do not show up until well past 500m. In a dedicated long range hunting rig yes that is the way to go but it comes at the expense of a usually much heavier rifle with a lot more recoil. I just don't get the have to have a magnum school of thought unless you really think your going to be taking shots in the 800-1000m range.
Here is some data for my personal rifles all zeroed at 100m with a 10mph wind
260rem 130gr berger muzzle velocity 2850 (be similar to the creedmore for the OP)
500m 48.5in drop 15.5in drift 2000fps 1166ft/lbs (marginal for elk good for deer)
1000m 322in drop 75in drift 1318fps 502 ft/lbs (paper only)
280AI 168gr Berger Muzzle velocity 2950fps (My go to hunting rifle)
500m 45in drop 13in drift 2177fps 1768ftlbs (Enough for any game animal in North America)
1000m 289in drop 60in drift 1527fps 870ftlbs (Marginal for deer)
300wsm 212gr ELDx Muzzle velocity 2700fps (theoretical just got this rifle haven't worked up a load for it yet but this is the goal)
500m 55in drop 12.5in drift 2044fps 1967ftlbs
1000m 335in drop 60in drift 1482 1034ftlbs energy (borderline enough to hunt at this distance in my opinion)
Played with the numbers to see how fast I would have to push the 212gr ELDX to get velocity and energy I would be comfortable with on elk at 1000m I wanted a minimum 1250ftlbs I don't totally agree with using ftlbs as a measure of how effective it will kill bullet construction has a lot to do with it. But it is generally accepted and if I have that much energy I would have the velocity I want for my bullet type.
.30 212gr ELDX at 2900fps
1000m 282.5in drop 52in drift 1630fps 1251ftlbs
So in order to hunt elk with this bullet at 1000m I need to find a case that will push it at least 2900fps in a 24in hunting barrel (personal preference going to a 26in barrel would gain you about 50fps) I don't think a 300win mag would do it I could be wrong I don't have a win mag I bet a 30nosler would do it. But then I would need to go drop a $1000+ to get a range finder that would accurately range a animal at that distance.
I also played a bit with figuring out what my margin for error in range at a 1000m would be I decided to allow for 10in above or below my point of aim for a 20in total Kill zone I think that's pretty generous.
980m 272.2in at 1000m 282.5in at 1020m 292.5in so that means that if you are off by 20m in you range at that distance your looking at a miss or wound that's not even taking into account that your probably in field conditions at best grouping MOA at 1000m so your bullets are going to land some where in a 10in circle around your point of aim so 5in in either direction if you do everything perfect. So elk is at 1020 instead of 1000 and you happen to fire that one bullet that goes 5in lower you are now looking at a 15in miss low. To many variables for me to take that shot.
These are just my opinions there is a lot more factors to long range shooting then just getting the biggest boomer out there. I love practicing at long range 1000m plus because it makes my typical 200m or less hunting shot feel oh so easy.
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I was with you all the way, until I saw "
but those benefits do not show up until well past 500m." If you were referring to trajectories, I see that. However, I think the benefits of the larger caliber projectiles show up long before the 500 yd mark in most hunting scenarios. Opinions differ regarding terminal performance but being a displacement junky ....