Sheephuntr
Well-Known Member
That is exactly what I was looking for!!!!
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270wsm vs 7 rem mag
- Thread starter Sheephuntr
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Turnbolt53
Well-Known Member
No reason. If you want drift figures, you can run the data yourself. I've given you velocity, caliber, bullet weight and G1 numbers. URL is: https://www.jbmballistics.com/cgi-bin/jbmtraj_simp-5.1.cgi
bigngreen
Well-Known Member
If your comparing long range bullets and chamberings leaving out windage is a little lame!!
AND...you can run the numbers YOURSELF
You have the data
You have the URL
Have at it and POST away!
therifleman556
Well-Known Member
I can already hear the cries of "But you're not comparing it to the 180 grain Berger at a primer popping 3200fps!"
Turnbolt53
Well-Known Member
Yes. Elevation is easy. Windage is voodoo.
Running a 277/150 against a 284/175 seems odd too, when there are so many great 284-160ish bullets with bc's well over .600 that can run out of the 7RM as fast as the 277/150 out of the 270WSM [since case capacity slightly favors the 7RM (78.95gr vs. 78.62gr) and the 7RM has the advantage of a larger bore diameter].
But . . . you only have to please yourself.
I don't care which one "wins" in this. I was just curious what the numbers would be. I don't have a hound in this dogfight. The OP was curious about the 150gr ABLR (.277) and the 175 ABLR (.284) specifically. That's why those were run. People were 'speculating' so I ran the numbers. OP didn't ask about wind drift so I didn't run for that. But you were curious about wind drift, so I gave you the URL and you have the info needed to run the numbers yourself.
Instead, you just keep complaining. It's getting old. You do realize we aren't getting "paid" to entertain you and make YOU happy, right?
RUN YOUR OWN NUMBERS AND POST.
Or...shut up already?
Instead, you just keep complaining. It's getting old. You do realize we aren't getting "paid" to entertain you and make YOU happy, right?
RUN YOUR OWN NUMBERS AND POST.
Or...shut up already?
Turnbolt53
Well-Known Member
Just file it for future reference . . . there's usually some drift to 1000 yards.
D
Deleted member 25294
Guest
Or the 180 ELDM at a very sane 3050..
Or a 162 ELDX at a realistic 3200..
This is not an apples to apples comparison of what these two rounds are capable of.
therifleman556
Well-Known Member
No, it's not. But then again I think we get hung up on head to head comparisons and forget to play to these cartridge's individual strong points. The 7mm does have some anemic load data floating around, but the 270 can be improved on too. I think if one were building a dedicated LR rig, the 7mm is tough to beat. For a hunting where weight and portability are a concern, the 270 is an excellent choice that can still stretch it's legs.
FIGJAM
Well-Known Member
You are assuming you can't exceed published velocities in the 270wsm as well - and if you really want to get crazy, run those 150ablr down a 26" tube and it looks even better.
Deep.
And if you go to this website:
https://www.jbmballistics.com/cgi-bin/jbmtraj_simp-5.1.cgi
And plug in these numbers:
.270 WSM (150gr ABLR @ 3,187fps using 68gr MagPro powder w/G1 BC=0.591)
7mm RM (175gr ABLR @ 2970fps using 62.5gr RL22 w/G1 BC =0.648)
You, TOO, could calculate for the wind drift you so desperately seek. Default is 10mph. Go nuts
Turnbolt53
Well-Known Member
As stated before, the case capacities are identical, so at the same pressure and the same barrel length, the velocities will always slightly favor the 7RM due to the slightly larger bore size.
In fact, the the 7RM will start the high bc 284/160-ish bullets at the same speed as the lower bc 277/150,
