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7mm rem mag vs 300rum better long range?

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Unread 11-29-2007, 09:21 PM
Junior Member
Join Date: Nov 2007
Location: Grand Junction Colorado
Posts: 13
7mm rem mag vs 300rum better long range?

I am looking into buying a new long range rifle and am stuck between which caliber to get I have heard that the 7mm mag is a flatter shooting round would this make it better for long range?

thanks for the help
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Unread 11-29-2007, 09:46 PM
Bronze Member
Join Date: Apr 2006
Location: Spokane, W.A.
Posts: 52
300 rum for sure...
but do you reload?...
either will eat up barrels pretty fast, so let them cool between shots.

flat shooting is not the end all in long range, wind drift, energy ect. all comes into play. imo the 338 rum is probably the best "cheap/entry" long range caliber, loaded of course with 300gr SMK's. not fast, but tons of pop, and highest possible B.C.'s, well unless you get into lathe turned coppers solids...to spendy 4 me!
Long Range? Dial 338-Lapua.
Sniper - If you run, you will only die tired.
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Unread 11-29-2007, 09:53 PM
Platinum Member
Join Date: Jun 2004
Location: Texas
Posts: 1,075
Without looking at loading data and external ballistics, I am guessing that the .300 RUM with its optimum bullet should be flatter than the 7 Rem Mag with its optimum bullet, at safe pressures. It would also have the advantage of a bigger, heavier bullet, which in my opinion, makes it more versatile.

Hope you get some more educated replies than this. Tom
Texas State Rifle Association Life Member
NRA Endowment Life Member

A big fast bullet will beat a little fast bullet every time
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Unread 12-01-2007, 05:07 PM
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Join Date: Jan 2003
Location: The rifle range, or archery range or behind the computer in Alaska
Posts: 3,830
You can get most 300 RUM's flatter than the 7mm Rem mag and do it with much more potency. The trade off is recoil and barrel life.
Long range shooting is a process that ends with a result. Once you start to focus on the result (how bad your last shot was, how big the group is going to be, what your buck will score, what your match score is, what place you are in...) then you loose the capacity to focus on the process.
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Unread 12-02-2007, 01:23 AM
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Join Date: Dec 2001
Location: Potters Hill, NC
Posts: 1,726
I started to chim in and say the .300RUM, even though I shoot the 7mmRM. However, I went to the Ballistic's Program right at the top of this Forum thread (Bullets, Barrels and Ballistics) entered the required basic info and came up with suprising results.
I used info from Noslers 5th edition. I used the 150gn Ballistic Tip for the 7mmRem Mag., with BC of .493 clicking along at 3248fps. This is acheived with 63.0gn of IMR4350. Zeroed at 300yds, bullet is 23.1" low at 500yds (4.4MOA) and 218.0" low at 1K (20.8MOA).
The 180gn Ballistic Tip was used for the .300RUM. It has a BC of .507 and clicks along at 3229fps. This feat took 89.0gn of IMR7828. Zeroed at 300yds, bullet is 23.1" low at 500yds (4.4MOA) and 216.3" low at 1K (20.7MOA).
The 7Mag 150gn gets to 500yds in .549 seconds, traveling 2305fps with 1769.8ft/lbs. At 1k (1.344 sec), 1551fps and 801ft/lbs.
The 300RUM 180gn gets to 500yds in .549 seconds, traveling 2313fps with 2138.7ft/lbs. At 1k (1.337 sec), 1575fps and 991ft/lbs.
Go with the 7Mag. You'll get the performance you need, less recoil and 33 more bullets per lb of powder. JohnnyK.
"The only thing necessay for the triumph of evil is for good men to do nothing."
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Unread 12-02-2007, 04:13 AM
Gold Member
Join Date: Oct 2004
Posts: 723
I´ve been shooting a 7 rm a lot and currently waiting for a 300 rum.-

Agree that the 7 rm is easier on your shoulder, pocket and barrel.- great bullets, good trajectories.- but the longer the shots, the more advantadge the RUm will have because of higher energy... if you are shooting at game big or far enough to need the extra power.
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