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new rifle

Hey Guys,

I’m inquiring about building a new tactical rifle,.300 Mag class). I´am thinking of .300 WbyMag or .300 RUM. What would be your choice? Which muzzle break would you use? Thanks in advance.

Mark
 
My choice would be 300 Win Mag,lots of good load data and brass as well as factory match ammo) and a Badger Ordnance break.
 
Hi for a true long range tacticle rifle i would go with a 7mm REm SAUM using 175gr Sierra projectiles it will kill the balistics of all the short 30's including the 300 Win Mag. now for a long range rifle used for deliberate shots used sparingly the 300 RUM would be my choice with a 10 twist 30" barrel Badger brake and use 210-240gr MAtchKings this would be an extreem range rifle.

Cheers Bill
Australia
 
Sorry JER i would have to disagree on that in part it is a must to be able to hit the target but at the distance a 300RUM or 7mm SAUM will be accurate the 308 will not have enough energy to humanely dispatch game also the ease of getting the corect bullet drop and windage with a cartrige that has better balistic characteristics is important. on a rifle range go for it a target will not relise the diference but in the field the more efficient in the wind and less drop menas the shooter has a better chance to gain a humane 1 shot situation. By your quote a 6mmBR would be as good as they are at least as accurate but the bullet energy is not worth using.

Cheers Bill
Australia.
 
Wild_Bill said:
Hi for a true long range tacticle rifle i would go with a 7mm REm SAUM using 175gr Sierra projectiles it will kill the balistics of all the short 30's including the 300 Win Mag. now for a long range rifle used for deliberate shots used sparingly the 300 RUM would be my choice with a 10 twist 30" barrel Badger brake and use 210-240gr MAtchKings this would be an extreem range rifle.

Cheers Bill
Australia

I shoot a Winchester Custom Shop Sharpshooter in .300Win. Mag. and don't believe for one minute that a tactical rifle chambered in 7mm SAUM will beat it at 1000yds. under ACTUAL FIELD CONDITIONS. A 190SMK at 3000MV will beat the best that a SAUM can do with a 175SMK at 1000yds. at REALISTIC velocities.

Alan
 
I get a difference of about 5" in drift in advantage of the 7 RSAUM with 175 SMKs at 2800 fps for avg spring/fall conditions in E TX over my 300 WM with 190 SMKs at 3000. The 300 is flatter shooting by about 20", but the 7mm takes it in drift.
 
sewwhat89 said:
I get a difference of about 5" in drift in advantage of the 7 RSAUM with 175 SMKs at 2800 fps for avg spring/fall conditions in E TX over my 300 WM with 190 SMKs at 3000. The 300 is flatter shooting by about 20", but the 7mm takes it in drift.

That's why I was specific in saying "Tactical rifle"! Most of the Tactical matches that I've competed in are shot at UKD's with no laser rangefinders permitted, no wind flags, and with strict time limits for each event.

I've found that the flatter trajectory of the 300WM is a great advantage, especially when considering the natural inaccuracy in range-doping of the mil-dot method at ranges over 800 yds. The time limit that's imposed on competitors combined with gusty winds and no wind flags doesn't leave room for cranking windage in via the windage knob, so the competitor is better served by his ability to quickly hold off the target and get his shot off hoping that his skill and experience with the rifle/load that he's shooting combined with his ability to dope the wind conditions AT THE TARGET,and a lot of luck) will result in a good score :)

Alan
 
Hey why not a 300 H&H? I have a pre 64 model 70 Winchester that shoots very well to 800 and 1000 yrds. Not saying this is the best way to go but this works for me. Although brass is hard to find for it some times. I save every bit of brass that can for my reloads and this helps out alot on expense.
Greg
 
I don't know if you have an action already but if not I would go with a 6.5x284. Good ballistics and a lot less recoil. Barrel life is about the same. You just have a hard time beating a 6.5x284 in tactical matches that I have been in. I started off shooting 308s went to 300wm's and then to the 6.5x284s. Now I have come back to a 260 or a 6.5x55 trying to get better barrel life.

Many of the guys are now going to the 6MMs using the 115s. These things will shoot right with the big magnums and don't beat you up so bad. Another caliber that is starting to show up is the straight .284 with the 168s they seem to shoot well at 1000yds also.

I hate the man on man stuff or speed shooting but the lighter recoil makes a difference in recovery time. I don't think these events have a place in tactical shoots but they all seem to have them. All they do is ruin barrels in my opinion. Good luck in your quest!!!
 
I don't think a 300 Win Mag can out perform my 7 RSAUM ballistics at 1K. Built it on an A5, Remmy SA with a Kreiger #17 barrel. I get 2980 with the Berger 180s and 3020 with the 175 SMKs. Talked to Alan Warner at the F-Class Nats about his 7 short. He shoots the Berger's at about the same velocity.
 
Bolo said:
I don't think a 300 Win Mag can out perform my 7 RSAUM ballistics at 1K. Built it on an A5, Remmy SA with a Kreiger #17 barrel. I get 2980 with the Berger 180s and 3020 with the 175 SMKs. Talked to Alan Warner at the F-Class Nats about his 7 short. He shoots the Berger's at about the same velocity.


:eek: Damn,that sounds pretty warm.
 
Original load of 62.7 of R25 got the 180s over 3000 until temps went over 80degrees. Extractor marks and sticky bolt lift. Backed down to 62.3 and no signs of pressure at 90 degrees. Have about 800 rounds down the barrel and I can still hold about 12 inches at 1k. Rifle can probably do better but it has me for a nut on the trigger.:,
 
I had a .300 RUM with a muzzle break. Now I'm deaf. It was like getting slapped in the face with every shot.

My next rifle will be a 6.5x47 Lapua without a muzzle break.
 
I shoot a Winchester Custom Shop Sharpshooter in .300Win. Mag. and don't believe for one minute that a tactical rifle chambered in 7mm SAUM will beat it at 1000yds. under ACTUAL FIELD CONDITIONS. A 190SMK at 3000MV will beat the best that a SAUM can do with a 175SMK at 1000yds. at REALISTIC velocities.

That may be true for the SAUM using a 175 gr. SMK, but it is definitely not true for a 7mm SAUM using 180 gr. Berger @2850 fps,which should be a very doable velocity for that round) - the 7mm will be ballistically superior to the 300 WM at every range in terms of residual velocity, drop, time of flight, wind drift, energy. Plus, the 7mm extends the useful range of the rifle by 300 yards over the 300 WM. In other words, when the .30 caliber projectile has fallen into the transonic region, the 7mm bullet is still well above that region and will be for another 300 yards. The reason is the difference in the BCs. The Sierra 190 MK has a BC of .533 while the 180 Berger has a BC of .684. That difference gives the 7mm 180 gr. bullet a substantial advantage at range even though it is starting out at a much slower muzzle velocity.

The performance differential is even more stark when considering the 7mm 180 gr. JLK with a BC of .735, which effectively extends the useful range another 100 yards over the Berger bullet. And when moving to a cartridge that is more in line with the 300 WM's powder capacity, like the 7mm WSM shooting a 180 JLK at 2950 fps, the difference in ballistics is jaw dropping. At that point the only option for the 300 WM shooter is to move to heavier bullets, higher BC's while trying to keep the velocity up. However, even moving to the 210 gr. JLK with a BC of .665, the muzzle velocity will realistically drop to 2950 fps and that round would still be ballistically inferior to the 7mm WSM shooting either a 180 Berger or a 180 JLK bullet.

The fact is that the heavier 7mm bullets are extraordinary long range bullets that offer real benefits and advantages over what is currently available in .30 caliber.
 
ghermitage said:
Even though you were using some ear protection?

Foam ear plugs PLUS the highest NRR ear muffs I could find. Though I only fired 225 rounds before I sold that gun, I feel that this was a significant contributor to my tinnitus problem, which started about a year later. This is definitely part of the down side to the big magnums. I'm now back in the "small is beautiful" camp.,6BR anyone?)

The blast wave from the KDF muzzle brake was brutal.,100 gr of powder might have had something to do with it too.) I've heard that Vais muzzle brakes are not as loud, but have no personal experience.

As Blaine explained very well, the big magnums only make sense if you're going to shoot the heaviest bullets in that caliber,i.e., the highest BC) and then only if you care about shooting at extremely long range,say, 1200 yards and beyond).
 

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