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In what ways is the 300 WM superior to the 7mm?

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  • In what ways is the 300 WM superior to the 7mm?

    I've got an itch to put together a LA magnum rifle. I know there are superior cartridges to both, but I want the ability to buy off the shelf ammo.
    intended uses are:
    700-1400 yard steel ringing
    deer & elk hunting

    is there any reason to go with the 300 over the 7? Like I said, I will use factory ammo, but I also do reload, so I have some ability to accentuate strengths.

  • #2
    Cheaper and will reach out to 1400 no problem

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    • #3
      I'm assuming you're comparing it to the 7mm Rem Mag. The main difference is energy at distance as is the case with most caliber comparisons of similar case capacity. 300WM will have more factory options and the typical 1:10 twist will adequately stabilize anything you throw down the tube.

      7mm Rem Mag is great too. The 7mm is a bit of a work smarter not harder approach since you can achieve relatively high BC in a 180 grain VLD style projectile. This is the same reason people step down to the 6/6.5 mm's. The lower recoil in this case is something to consider, although not huge in this case. I'd go faster twist than most factory barrels however since most are 1:9.25 or slower; slower for a 7mm that is.

      Both have plenty of factory hunting loads, however for factory match grade/long range loads, I'd look to the 300.

      So, in summary, for energy and factory options go 300 WM. For high BC in a lower weight, and less recoil, go 7mm Rem Mag. You just have to rely more on your reloading.
      Last edited by GASSR20; 10-06-2017, 11:16 PM.

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      • #4
        I was making the decision about a year ago, went for 300 win mag purely for the more readily available factory ammo options. Testing out Hornady 200gr ELD precision hunter loads currently....here's my rifle...

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        • #5
          I did this same thing last year, both will do what you want easily but I went 7mm mag. I think you will be happy either way you go.

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          • #6
            Part of me wishes I went 7mm Rem Mag over .300WM just for recoil alone, but man do I love the sound of a 200gr pill hitting steel at 900 yards. Either one would allow you to harvest game with confidence.

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            • #7
              I'm going the other direction... .338 WM. Looks like I'll be able to run a 250 gr Berger w/ a g7 bc of .351 at 2800-2900 (out of a 26" barrel). Less than 8 mils of elevation to 1000, and about 1400 ft/lb at that same distance.

              Compared to 300 WM, factory ammo is pretty scarce, but it's still there. I haven't run the numbers past 1000, but I'm betting that it falls off pretty quick.
              ...I cut it twice and it was still too short...

              The user known as L98S10 on the old new Sniper's Hide

              The American Republic will endure until the day Congress discovers that it can bribe the public with the public's money. - A Tocqueville

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              • #8
                Donít forget about the heavy .30cals in the 300 if you reload. Iím launching a 225gr ELD-M at ~2800fps from a 26Ē barrel, with a Doppler G7 bc of 0.367. The 212 eld-x is ~0.336,
                Last edited by -Time-; 10-12-2017, 09:51 AM.

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                • #9
                  first is the availability of factory match ammo of a 300wm is only surpassed by availability of 308 ammo. and most match ammo for both 300wm and 308 are better than 90% of the guys who reload their own.
                  dont know how many guys ive seen who cant hit crap with their pet loads and then we give them some factory stuff and magically were on steel.
                  1400 yards is well with in the envelope of a WM, its actually just getting started.
                  usually the first caliber of a new bullet that is produced is a 30 cal so you will always have the availability of "newest and hottest", if you start reloading.

                  now i may get flagged for this, but FT/LBS is not the end all be all of ballistics when talking about hunting.
                  my personal experience and the experiences of friends that have been there...bigger bullet bigger hole.

                  example (numbers by the charts):
                  a 22-250 has almost the exact same amount of FT/LBS of energy that a 45-70 does when using the same bullets.
                  there is no debate what round has a better chance of stopping a angry brown bear.

                  the only down side is recoil, but that is why they make brakes.
                  There is no I in team

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                  • #10
                    Close with either, but i would take the 7mm. I think it packs energy better, and stays supersonic farther, but they are so close. Its really a preference thing, i dont think you will get much more than theoretical advantages either way.

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                    • #11
                      I have never seen an ammo shelf that didn't have 7RM ammo.
                      Everyone that makes ammo for the .300 WM makes ammo for the 7RM.
                      I happen to be a big 7 fan, but even I will readily admit that many of the 7RM loads are stupidly wanting.
                      It is an excellent long range cartridge, but the majority of your factory loads run between 145 to 150 grains.
                      it seems they intentionally handicap it with the lowest BC bullets they can find.
                      7RM loads should start in the 160 range and go up from there, but alas, very few do.
                      No one loads match ammo for the 7 either, while there are several, though not many, match loads for the .300.

                      Hornady has finally started to load some decent bullets in the 7.

                      As much as it pains me to say it, if you are western hunting and your shots may be long and you do not handload, then .300WM is probably your best answer.
                      Friend...
                      Even if you will make mischief itself in trousers - it not interestingly me...

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                      • #12
                        good Lord....handload, people. then the factory offerings can kiss your ass. none of my rifles shoot factory ammo. homemade cooking only. get the most out of your caliber....roll your own.

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                        • #13
                          to answer. your question....without looking and just going off the top of my head....under 500ish yards, the wm is going to have more power. you start getting past that, and the higher bc's of the 7mm take over. so if you want to retain the utemost in power way out there....without stepping above the 30 caliber...the RM is your animal.

                          but as others have noted...factory offerings suck. definately NOT riflemen deciding what loadings they are going to offer. i honestly would lose my shit if i had to rely of factory ammo due to the bullet weights offered in given calibers.

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                          • #14
                            Before going 7mm Rem or .300 Win, I'd go 7-300 Winchester. I don't care so much about factory ammunition.


                            If choosing one of the two, I would go .300 because of the heavy Bergers, barrel life, and energy. The 7mm just doesn't seem to have the capacity for the EOL.

                            Sent from my iPhone using Tapatalk
                            Last edited by tylerw02; 10-11-2017, 11:16 PM.
                            When somebody says "all day long", what they really mean is "once in a while".

                            Want to stop shootings in "gun-free zones"? Ban gun-free zones.

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                            • #15
                              Best solution is roll your own, big fan of 7mm imho perfect cal. The 7 mm version of any 30 cal will always be superior ie 708 vs 308 etc
                              7/300 norma if rolling your own
                              28 nosler for cots solution

                              We are asked not to judge all muslims by the acts of a few extremists,
                              but we are encouraged to judge all gun owners by extreme acts of the few
                              .

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                              • #16
                                i was recently looking over numbers on some stuff. i have a 300wsm, and was comparing the load i shoot in it to that of a 7mm-08 that i am considering getting for my boy. i was surprised to see that once you are over a certain distance (600 yards i believe-but going off memory so i could be wrong) that the 7mm-08 have more punch than the 300wsm. so then i compared the 7RM to the 300, and the wsm was overtaken by the RM at like 200 yards.....it was an eye opener for me.

                                now...i am sure that out there somewhere, there is a uber-premium bullet for the 30 calibers that have super high BC....but, i'm a working man on a limited income and shoot was a working man can afford. $2 per bullet just isnt going to happen for this guy. so in real-ville, for a guy like me, the 7mm is going to offer the most punch at distance. up close, the 300mags have more.

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                                • #17
                                  Originally posted by BurnOut View Post
                                  Looks like I'll be able to run a 250 gr Berger w/ a g7 bc of .351 at 2800-2900 (out of a 26" barrel).
                                  That looks awful fast for this combo. Are you actually able to achieve those velocities?

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                                  • #18
                                    Originally posted by CMH View Post
                                    That looks awful fast for this combo. Are you actually able to achieve those velocities?
                                    I'll let you know, hahaha... I am going based on Nosler's online load data: https://load-data.nosler.com/load-da...hester-magnum/
                                    ...I cut it twice and it was still too short...

                                    The user known as L98S10 on the old new Sniper's Hide

                                    The American Republic will endure until the day Congress discovers that it can bribe the public with the public's money. - A Tocqueville

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                                    • #19
                                      Originally posted by myronman3 View Post
                                      i was recently looking over numbers on some stuff. i have a 300wsm, and was comparing the load i shoot in it to that of a 7mm-08 that i am considering getting for my boy. i was surprised to see that once you are over a certain distance (600 yards i believe-but going off memory so i could be wrong) that the 7mm-08 have more punch than the 300wsm. so then i compared the 7RM to the 300, and the wsm was overtaken by the RM at like 200 yards.....it was an eye opener for me.

                                      now...i am sure that out there somewhere, there is a uber-premium bullet for the 30 calibers that have super high BC....but, i'm a working man on a limited income and shoot was a working man can afford. $2 per bullet just isnt going to happen for this guy. so in real-ville, for a guy like me, the 7mm is going to offer the most punch at distance. up close, the 300mags have more.

                                      The higher weight 7mm bergers have bcís in the .330-.340, the higher weight .30cal bergers and hornadys are in the .340-.360s. What are you using thatís getting smoked by a 7mmRM, much less the 7mm-08?
                                      Last edited by -Time-; 10-12-2017, 10:08 AM.

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                                      • #20
                                        Superior???
                                        Recoil. Blast. Powder burned. Weight.
                                        It has some military support going for it, so there's that.

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                                        • #21
                                          Originally posted by -Time- View Post


                                          The higher weight 7mm bergers have bcís in the .330-.340, the higher weight .30cal bergers and hornadys are in the .340-.360s. What are you using thatís getting smoked by a 7mmRM, much less the 7mm-08?
                                          It's not just about BC. Velocity plays a part too. 7mm is faster than the .30 heavies, and that compensates for the small differences in BC. Keep in mind, the differences are so small that it's an academic discussion. Anyone actually firing these rounds (7mm vs heavy .30) will never see the ballistic differences.

                                          The deciding factors are lower 7mm recoil versus better killing power of 300wm. The latter is relevant to sub-optimal shot placement. If you never miss the kill zone, then 7mm is your cartridge. For us mortals, kill effectiveness is a consideration.

                                          300wm has better kill power because of things like higher sectional area (read: bigger hole) and mass (read: momentum). Both translate to better energy dump on your target.

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                                          • #22
                                            A 7mm RM will launch a 195 gr Berger (0.387 BC) as fast or faster than a 300WM will launch a 230 Berger (.368). Faster + higher BC equals better ballistics, simple. And a 7mm RM is more than enough to launch the 195s, it will go about 2850 fps (26" barrel). When Berger releases their 245 30 cal bullet the ballistics may be washed out.

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                                            • #23
                                              I prefer 7mm. High BC, low recoil. I am not interested in factory ammo. They are relatively expensive and inaccurate. With handloading, you have more options and combinations in bullet and powder. Most of them outperform any factory ammo you can get from the market.

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                                              • #24
                                                Time....

                                                look at hornady's bullets. AMAX and match bullets more specifically. the 7mm bullets BC is one helluva lot higher than .340 and .360.

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                                                • #25
                                                  ,796 for the ELD match in 180 in 7mm. and .777 for the 225 308...which i hadnt seen before. a bit too heavy for the wsm; but i bet the wm would handle it well.
                                                  Last edited by myronman3; 10-12-2017, 03:05 PM.

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