Hypothetically speaking...... - The HuntingPA.com Outdoor Community
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post #1 of 19 (permalink) Old 03-16-2014, 03:22 AM Thread Starter
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Hypothetically speaking......

Considering every rifle, even the same model and caliber have microscopic differences.

Hypothetically, If I were to be able to produce 2 mathematically identical rifles, one in 308win, one in 7mm08Rem.

Identically loaded with exactly the same load of the same powder.

Loaded with identical primers.

Loaded with exactly 150gr projectiles, one 7mm, one .308

Both zeroed at 300yd with absolutely no wind deflection.

I take both rifles on the exact same range and add a steady 8mph east to west wind.

Fire the rifles without correcting windage.

Which rifle will suffer more wind deflection?

Now bear in mind I know its impossible to test this theory as the parameters of the test could never be met.

That's why its hypothetical

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post #2 of 19 (permalink) Old 03-16-2014, 09:38 AM
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Re: Hypothetically speaking......

Quote:
Which rifle will suffer more wind deflection?
or "bullet" the rifle won't suffer

i would say 308 because hypothetically it would have a lower BC projectile, basically that is what you are comparing as that is therotically the only difference.

that is why so many claim the 7mm is better than the 308. It is up until a point as the 308 can run 240gr bullets and the 280 @180gr on the heavy side.

A "clip" is a clip, aka Def: a device, typically flexible or worked by a spring, for holding an object or objects together or in place.
a "Magazine" is a magazine aka Def: a chamber for holding a supply of cartridges to be fed automatically to the breech of a gun.

so a "clip" holds the "magazine" in place. get it?
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post #3 of 19 (permalink) Old 03-16-2014, 12:40 PM
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Re: Hypothetically speaking......

Wondering the reason behind the question. Trying to decide on a cartridge? Just curious.

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post #4 of 19 (permalink) Old 03-16-2014, 01:56 PM
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Re: Hypothetically speaking......

At 300 yards there would be statistically no difference.

The 7-08 bullet has better BC numbers. The .308 bullet has less time in flight.

They would both drift 5.4-5.5 inches in an 8 mph crosswind at 300 yards.

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post #5 of 19 (permalink) Old 03-16-2014, 01:57 PM
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Re: Hypothetically speaking......

The .308 would have about an inch flatter trajectory to 300 yards as well.

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post #6 of 19 (permalink) Old 03-16-2014, 02:41 PM
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Re: Hypothetically speaking......

Quote:
Both zeroed at 300yd with absolutely no wind deflection
i dont think he was wondering at 300yds but past that...?
say 800yds which would drift less i think is what he was after?

aka everything equall at 300 including zero.I assumed equal velocity?

at long range which would drift less is how i read it?

without running the numbers i am assuming a higher BC of the 7 but you did bring up a valid point as velocity was not mentioned which TOF is another factor

A "clip" is a clip, aka Def: a device, typically flexible or worked by a spring, for holding an object or objects together or in place.
a "Magazine" is a magazine aka Def: a chamber for holding a supply of cartridges to be fed automatically to the breech of a gun.

so a "clip" holds the "magazine" in place. get it?
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post #7 of 19 (permalink) Old 03-16-2014, 02:51 PM
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Re: Hypothetically speaking......

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Originally Posted by 300 Norma Mag
Quote:
Both zeroed at 300yd with absolutely no wind deflection
i dont think he was wondering at 300yds but past that...?
say 800yds which would drift less i think is what he was after?

aka everything equall at 300 including zero.

at long range which would drift less is how i read it?

without running the numbers i am assuming a higher BC of the 7 but you did bring up a valid point as velocity was not mentioned which TOF is another factor
Oh. My dumb.

Interestingly enough, there's a whopping 1 inch difference (favoring the 7-08) in wind drift at 800 yards using the same comparison.

However............ and this surprised me............ the .308 Win drops about 25 inches LESS than the 7-08 at 800 when zeroed at 300 !!! I wouldn't have called that one right off the top of my head.

I am running data for 150 gr. Nosler BT max velocity loads as listed in a major powder manufacturer's load data.

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post #8 of 19 (permalink) Old 03-16-2014, 03:05 PM
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Re: Hypothetically speaking......

i wouldnt say dumb at all, there are alot of hypotheticals in the OP LOL!

I'm being lazy but can you paste the two charts?

i just figures both 150's crossed the 300yd line at the exact zero and speed, what they would be at 800 or maybe 1k? It would be good to see the down range energy comparason also.

i would probably run JBM Calc and choose Litz (G7)as being more realistically accurate due to misrepresented manufacturing data inflated G1's

A "clip" is a clip, aka Def: a device, typically flexible or worked by a spring, for holding an object or objects together or in place.
a "Magazine" is a magazine aka Def: a chamber for holding a supply of cartridges to be fed automatically to the breech of a gun.

so a "clip" holds the "magazine" in place. get it?
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post #9 of 19 (permalink) Old 03-16-2014, 04:09 PM
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Re: Hypothetically speaking......

The 308 is a little faster, that helps make up the BC difference. When it comes to wind at long range, you compensate or you lose. 1" at 800yds = no difference IMO. I don't care how "flat" or well it "bucks" the wind. At long range it's significant no matter the caliber. It's all shooter at that point. That's why I wonder the reason for original question, if it's cartridge choice, I would make it based on other considerations.

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post #10 of 19 (permalink) Old 03-16-2014, 08:14 PM Thread Starter
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Re: Hypothetically speaking......

Quote:
Originally Posted by kdvarmint
Wondering the reason behind the question. Trying to decide on a cartridge? Just curious.
Testing applications of BC, SD, and Ojive data under a controlled test.

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