McWhorter Rifles 6.5 Wby Mag.!!

[jbroadnax]

I have been talking with Allan at McWhorter rifles and he is been talking about the develpment of the 6.5wby mag. Well Tim has built a few and Allan has been testing. 3275fps with 140 Bergers with a BC of .595. Tim has always had the wby case as a pet but this high BC 6.5 is going to be awesome. 200 more ft lbs. of energy at 600 yards than a 270wby and just as accurate. Milder recoil too.


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[nathank]

Pretty cool, I wonder wat barrel life is like?

[Fiftydriver]

Not trying to be a stick in the mud but please explain to me why this is any different then a 264 Win Mag? In fact, a 264 Win Mag case has a larger powder capacity then what this 6.5-270 Wby case would.

This is the same as the 7mm Rem Mag compared to the 7mm Wby Mag. The Rem Mag on average will have a slightly larger case capacity but for some reason, the Wby Magnum is loaded to much higher pressures and is often totted as having 150-200 fps velocity advantage over the 7mm Rem Mag.

Anyone that has loaded for either of these 7mm rounds know that the 7mm Rem Mag is at least the full equal to the 7mm Wby Mag when fed proper handloaded ammo and not the whimpy factory loaded 7mm Rem Mag ammo.

Anyway, just curious why one would want to deal with soft Wby brass which is EXTREMELY expensive when you could just get a rifle built in a tight chambered 264 Win Mag, get the same accuracy, same performance at least and save so much in brass cost and likely get longer brass life as well, especially if you use Winchester brass which is generally on the harder side and MUCH harder then any Wby brass made. Wby brass is not known to play well with top end chamber pressures.

If you want real meaningful velocity gains over the 264 Win Mag class of chambering, I would recommend you look at a 6.5 STW or 6.5 Dakota.

Just my opinion, Not knocking these guys but from my experience, they have repackaged the great old 264 Win Mag and just put a new name on it and a double radius shoulder but in the end no difference in performance or accuracy potential.

[jbroadnax]

Tim is getting 3300 out of 140grs with a 24" tube. Pretty sure you won't get that out of a 264 win mag. My experience in getting incredible accuracy out of the wby case is effortless. I can take any "Tim Built" 270wby and load 140's of top of 69.5-71.5grs of VitN560 and it is going to shoot bug holes. I really don't need to try anything else. Sure you can make some gains in velocity in a 6.5stw or some variation but 20 more grs of powder for 50-75fps is not a super idea. Increased case capacity does not necessarily equal more performance. I can get 3150 out of a 300win mag 180gr with 75grs of 4831. I can get 3400 out of a 30-378 180gr with 117grs of H870. Obiviously that wby case is not terribly efficient. As far as the price of brass goes, many that buy a 4k dollar rifle are not concerned about an extra 75cents to a dollar a round.

[AZShooter]

I went to McWorter's site and didn't find anything on this chambering. Is it built on the 270 Weatherby case? When I first read the thread I thought of the old 6.5-300 Wright/Hoyer but Kirby suggested it is the 270 Weatherby length.

I too am skeptical unless McWhorter is using a double diameter bullet, lots of freebore and a special coating on the bullet to lessen pressure. Any details? If it based on the 300 Weatherby then I can believe the velocities.

[jbroadnax]

Click on the What's New link to read the details. It is a 270wby necked down. N560 and this case are just great together.

[AZShooter]

That is screaming velocities for those bullets! I had a 270 Weatherby with a 26" barrel and it shot the 130 NBT at 3475 so I suppose this is within the realm of possiblities.