what is the flattest shooting cartridge?

I pay between $70.00 to $75.00 for a bag of 50 and just bought a bag of 50 375RUM last week @ WSS in Kamloops for $73.95.

I'm on my 7th loading on some of my 300RUM brass and 5th loading on some of my 375RUM brass tough enough for me so far.
 
When you ask flattest shooting without specifying the use, that makes it too abstract a question. The others are right though who mention there are different flat-making factors and that you can't have all of them. Two more that got left out are the law of diminishing returns and barrel wear as you get to the upper end of what you can cram into a case behind the bullet. Another is accuracy which will have different parameters for shooting moose, gophers or paper targets in different types of competition. Although a bit smaller than your 270 minimum, it's no accident that 6.5/284 rules the long distance roost. In addition to factors of efficiency and accuracy there's also a great choice of high sectional density long distance 6.5mm bullets.
 
Camp Cook said:
I pay between $70.00 to $75.00 for a bag of 50 and just bought a bag of 50 375RUM last week @ WSS in Kamloops for $73.95.

I'm on my 7th loading on some of my 300RUM brass and 5th loading on some of my 375RUM brass tough enough for me so far.
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There's a little more to it than price of brass and number of loadings. Reamers get ordered based on the dimensions of the brass on hand. When a no-neck- turn chamber turns into a neck turning job because the brass changed from lot to lot it gets frustrating. Swapping to different bushings for the different thickness of necks is also frustrating. Keeping it all straight is maddening, but so is turning every case. I can't even count on Nosler brass being the same box to box, some had thicker necks than the Remington, some have thinner. Somewhere along the line I got to wondering if an extra hundred bucks or so per hundred for Lapua brass was that big of a savings. Did I mention that the Nosler cases are soft? Loaded sanely, a couple hundred Lapua cases should take the best that the barrel has to offer anyway. My next big .338 will be a Lapua, or a Lapua AI.
 
If you shoot factory ammo, I'd say 7mm Rem.Mag or 300 Win.Mag are your best choices considering ammo is priced fair and readily available just about any where that sells ammo. Hard to beat that kind of performance for the price in factory loads. Like others have said the 270 Win. is cheap to shoot as well and a great performer.
 
Calum said:
A 300 watt laser shoots pretty flat. :D
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Phased plasma rifle in the 40-watt range...now THAT'S the schitt. I think you can only get them from LaRue:p

The 300 WM, 7mmRm, .270 Win. - all readily available, flat shooting, and easy on the wallet.
 
these are the amounts of drop in inches at 500 yds when zeroed at 200.loads taken from Federals charts
270wsm -140gr -32.7"
270wby-130gr-34.3"
7rem mag -140gr-35.8"
7wsm -140gr-30.6"
7wby-160gr-34.6"
7stw-160gr-34.6"
300wm-130gr-30.8"
300wsm-130gr-30.8"
good ol 270 win 130gr-38.8"

so it seems that anything from 30 to 35 inches of drop at 500 yds would be about as flat as you could hope for.
 
xcaribooer said:
these are the amounts of drop in inches at 500 yds when zeroed at 200.loads taken from Federals charts
270wsm -140gr -32.7"
270wby-130gr-34.3"
7rem mag -140gr-35.8"
7wsm -140gr-30.6"
7wby-160gr-34.6"
7stw-160gr-34.6"
300wm-130gr-30.8"
300wsm-130gr-30.8"
good ol 270 win 130gr-38.8"

so it seems that anything from 30 to 35 inches of drop at 500 yds would be about as flat as you could hope for.
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Not a huge difference when it comes down to it...and easily compensated for via scope adjustments, anyway.:p
 
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