240 vs 243

Gatehouse said:
Do you think that the same deer, at the same distance, hit in the same place, with the same bullet but launched from different cartridges would react differently depending on the cartridge?
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I would say potentially yes. I’ll try and explain the thoughts that have been rolling around my head for a few weeks.

If the velocity differential between the two cartridges is enough to cause the bullet to react substantially differently upon impact then yes. The line of thought I keep messing with specifically involves the lightweight for caliber Barnes Bullets available. If we remove the “long range” game from the equation and simply talk of normal 0-300 maybe 400yrd shots on game. And we use the cartridge capable of pushing the little Barnes the fastest, we possibly stress the bullets enough to act like Nosler Ballistic Tips or Other rapid expansion cup and core bullets. Potentially giving similar drastic results without lead fragments contaminating our meat.

In a use like that then the cartridge with most capacity potentially beats out the one designed with much better ballistic efficiency. Possibly, maybe.
 
leveractionjunkie said:
I would say potentially yes. I’ll try and explain the thoughts that have been rolling around my head for a few weeks.

If the velocity differential between the two cartridges is enough to cause the bullet to react substantially differently upon impact then yes. The line of thought I keep messing with specifically involves the lightweight for caliber Barnes Bullets available. If we remove the “long range” game from the equation and simply talk of normal 0-300 maybe 400yrd shots on game. And we use the cartridge capable of pushing the little Barnes the fastest, we possibly stress the bullets enough to act like Nosler Ballistic Tips or Other rapid expansion cup and core bullets. Potentially giving similar drastic results without lead fragments contaminating our meat.

In a use like that then the cartridge with most capacity potentially beats out the one designed with much better ballistic efficiency. Possibly, maybe.
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it's easier to agree with this if we have 2 cartridges that are very different from each other- like a 30-30 vs a 300 RUM. But the 3 here- 243/6CM and 240 WBY are really so close in velocity/energy at 300 yards that I personally find it hard to believe we would see a difference.

But then again, sometimes animals hit with smaller cartridges go down faster than animals hit with big cartridges, so go figure. :)
 
Gatehouse said:
it's easier to agree with this if we have 2 cartridges that are very different from each other- like a 30-30 vs a 300 RUM. But the 3 here- 243/6CM and 240 WBY are really so close in velocity/energy at 300 yards that I personally find it hard to believe we would see a difference.

But then again, sometimes animals hit with smaller cartridges go down faster than animals hit with big cartridges, so go figure. :)
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True these three cartridges don’t have a huge velocity spread, approx 300fps between 243 & 240 based on Barnes website. 6mmCreedmoor isn’t listed with the 80grTTSx but it’d be in the middle I suspect. I wonder if 300fps is enough difference or not. And if not, how much velocity difference is necessary?
 
leveractionjunkie said:
True these three cartridges don’t have a huge velocity spread, approx 300fps between 243 & 240 based on Barnes website. 6mmCreedmoor isn’t listed with the 80grTTSx but it’d be in the middle I suspect. I wonder if 300fps is enough difference or not. And if not, how much velocity difference is necessary?
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I have seen a 80gr TSX launched from a .243 go end to end on a big black bear. I'm not a big .243 fan, but I don't think it would have mattered f the bullet was going 200-300 fps faster. :)
 
Gatehouse said:
I have seen a 80gr TSX launched from a .243 go end to end on a big black bear. I'm not a big .243 fan, but I don't think it would have mattered f the bullet was going 200-300 fps faster. :)
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Can’t really ask more of a 243 cal bullet than that can we. In which case I would personally pick the 6mmCreedmoor for the fast twist barrel and ability to long bomb targets and varmints with high BC bullets as well as deer with mono metals. Or 1:7 barreled 243 for the uses stated above along with the cheapest brass of the three.

Companies really should start increasing barrel twist standards on a lot of cartridges.
 
243 Win Federal Premium 100gr Sierra Boat Tail @ 2960 fps
200y zero, 2560 fps / 1450 ft lbs energy
300y -6.7" drop, 2370 fps / 1245 ft lbs
$1.85 per round

240 Wby Mag, Weatherby 100gr Norma Spitzer @ 3200 fps
200y zero, 2607 fps / 1510 ft lbs energy
300y -6.3" drop, 2340 fps / 1215 ft lbs
$3.50 per round
 
rkm456 said:
That'd be a cool build, but for a variety of reasons not really on my list of interests. I do wonder how a 103 or 108 would run out of a standard 1:10 twist barrel.
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They hit the paper sideways out of a 1:10 243, I'm sure the 240 would be similar result. The extra velocity of the 240 would give 4% more stability than the 243 in a 1:10 with the 108ELD
 
todbartell said:
243 Win Federal Premium 100gr Sierra Boat Tail @ 2960 fps
200y zero, 2560 fps / 1450 ft lbs energy
300y -6.7" drop, 2370 fps / 1245 ft lbs
$1.85 per round

240 Wby Mag, Weatherby 100gr Norma Spitzer @ 3200 fps
200y zero, 2607 fps / 1510 ft lbs energy
300y -6.3" drop, 2340 fps / 1215 ft lbs
$3.50 per round
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Again a INferior Bullet Put the SPBT Sierra in the 240 3200-300- and see the DIFFERENCE ! LOL RJ
 
FLHTCUI said:
But, they shoot flatter and hit harder than Savage Axis....
As for the burning of the barrel, well anyone can do that ...even to the queen the Ruger 375 .
All one has to do is keep wasting ammo chasing the 10 ring.
Shoot it if you got it and stop worrying about the couple of fps it may or may not gain over its relative.
Rob
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FLHTCUI said:
Where does that leave the 375Ruger?
Rob
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tenor.gif

Had to steal that GIF, fits this guys posts to a T. Always coming strait outta left field.
 
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