7mm. weatherby mag & 7mm. rem. mag

[Hunter Fishman]

OK, bare with me...
1)What is the difference between 7mm. weatherby mag & 7mm. rem. mag?
My cousin let me barrow his 7mm. weatherby but bought 7mm. rem. mag ammo. I sized up the two side by side & the only difference is the 7mm rem. mag ceseing is barely shorter but has a straight crimp where the caseing tapers to the bullet & the 7mm. weatherby mag has a sloped casing crimped to the bullet.
2)will 7mm. rem. mag ammo shoot out of the 7mm. weatherby mag rifle or will it damage the gun or jam the shell like I'm thinking it will?
I refuse to shoot it till I find out the absolute truth.
I carefuly chambered a 7mm. rem. mag shell in the weatherby but the bolt has to be forced closed because of the straight taper as aposed to the sloped taper.
My cousin told me he sighted in the weatherby rifle with the 7.mm rem. mag ammo but then handed me the full box of ammo. I brought it to his attention & he finaly admitted he lied. he used 10 year old re-loads.
I am upset with him because he could have killed or seriously injured me or those around me.
3)Has anyone ever actualy shot (off the shelf) federal 7mm. rem. mag out of a 7mm. weatherby mag rifle?
will it shoot?

Thank you for your time & please only knoledgeable answers.
If you don't have first hand experience with this please dont reply.

[yooper77]

OK, bare with me...
1)What is the difference between 7mm. weatherby mag & 7mm. rem. mag?
My cousin let me barrow his 7mm. weatherby but bought 7mm. rem. mag ammo. I sized up the two side by side & the only difference is the 7mm rem. mag ceseing is barely shorter but has a straight crimp where the caseing tapers to the bullet & the 7mm. weatherby mag has a sloped casing crimped to the bullet.
2)will 7mm. rem. mag ammo shoot out of the 7mm. weatherby mag rifle or will it damage the gun or jam the shell like I'm thinking it will?
I refuse to shoot it till I find out the absolute truth.
I carefuly chambered a 7mm. rem. mag shell in the weatherby but the bolt has to be forced closed because of the straight taper as aposed to the sloped taper.
My cousin told me he sighted in the weatherby rifle with the 7.mm rem. mag ammo but then handed me the full box of ammo. I brought it to his attention & he finaly admitted he lied. he used 10 year old re-loads.
I am upset with him because he could have killed or seriously injured me or those around me.
3)Has anyone ever actualy shot (off the shelf) federal 7mm. rem. mag out of a 7mm. weatherby mag rifle?
will it shoot?

Thank you for your time & please only knoledgeable answers.
If you don't have first hand experience with this please dont reply.

Ok, first thing is to never ever use ammo that is not the same as what is indicated on the firearm.  If this rifle is labeled for 7mm Weatherby Magnum then only use that ammo.

This is from the Weatherby Mark V manual:
Most Mark V rifles are chambered for Weatherby Magnum cartridges having a
headstamp WBY MAG. The use of any cartridge bearing a different headstamp could
be dangerous and result in injury to you or your firearm. Warning: 7mm Remington
Magnum ammunition is NOT interchangeable with 7mm Weatherby Magnum
ammunition in any way.

http://com.weatherby.s3.amazonaws.com/_media/ownersmanual/media/36.mark_v_usa.pdf

Yes the 7mm Remington Magnum will chamber with force (bad!) and fire in a 7 mm Weatherby Magnum chamber.  The problem is over time there can or will be a ring / groove cut into the chamber at the case opening and if you chamber and fire the longer 7mm Weatherby Magnum cartridge it can be stuck in the chamber because the brass will flow into this ring / groove.

Do to high Weatherby ammo / brass cost some people use 7mm Remington Magnum brass and resize it for use in 257, 270 and 7mm Weatherby Magnums, and don’t have any problems, but If these rifles are sold and the longer Weathereby Magnum cartridges are used, then the above problem can occur.  I personally would never purchase a used 257, 270 and 7mm Weatherby Magnum rifle, because I know this happens to these rifles.

yooper77

[Graybeard]

Do NOT try it. Look in a reloading manual or online at the specs for the two rounds and you'll see they are enough different to make it unsafe. The Rem mag is enough shorter it would chamber and the belt would headspace it but there would be space left unfilled by the case. It shouldn't harm you and would fire form to the chamber but still it's not a good idea to use improper ammo.

Performance wise the two are basically twins tho as factory loaded the Whby round has about a 100 fps edge on the Rem mag.

Whby uses a double radius shoulder and the Rem mag a standard angled shoulder plus the neck lengths are different.

[Hunter Fishman]

THANK YOU! THANK YOU! THANK YOU!
I have been looking for knowledgeable answers for over a month now & only received opinions which did me no good & caused me a lot of frustration. Even the guys at bass pro & local gun stores couldn't even answer this question! Its beyond me how these stores are still in business or haven't been sued repeatedly.
I understand that this inst a very popular round but it still exists & is sold in these stores & they need to have this knowledge on hand for there customers.
Again I thank you yooper77 & graybeard you've provided the only help I've received on this one.

I CAN FINALLY BREATH....AAAaaahhhh

[yooper77]

hunterfishman, You are welcome.

I am assuming this is a Weatherby Mark V action?  Deluxe, Synthetic or what type of finish or stock?

The 7mm Weatherby Magnum is a very popular, extremely accurate long range cartridge.

It would pay to buy some Weatherby ammo and sight it in and use it once and awhile on hunts or if you reload buy the correct headstamped brass.

yooper77

[Hunter Fishman]

I would love to own this gun, tho really heavy with the wood stock & over kill for small southern CA. mule deer but it has alot of meaning to me. It belonged to my uncle who was my only relative who hunted & passed away a few years back & now is in the possesion of his son/my half wit cousin. I thought he would be just like his father but I couldnt have been more wrong. he came down for one day to hunt but spent all day texting his co-workers & threw his lunch trash in my forest!   not to mention he got lost & shot a whole box of ammo in my hunting area.
down here in southern CA the 7mm isnt popular at all because theres nothing to hunt with it other than small mule deer black bear wild pig & coyotes. I should have mentioned that...I wasnt thinking.LOL
I need a short barrel 308. or 25-06 that would be perfect or maybee a 30-06 but again might be much in some peoples opinion. our mule deer are like coues deer. did I spell that right? coues deer?

[Graybeard]

Yup that's how it's spelled and the way I pronounce it. I refuse to pronounced it cows even tho they say that's how the man they were named for pronounced his name.

There is nothing wrong with using the 7MM for the game you have. Place the bullet properly avoiding the shoulder and hitting the heart/lungs and game will fall and die and little useable meat will be lost. Unless you save the ribs or eat the internal organs (I don't) then no meat is lost.

It's a bit more recoil than my tender shoulder likes these days tho in the days of my youth I used to think I wanted one. Now the .257 Whby Mag seems to suit my shoulder better. With the super soft recoil pad on it recoil is no worse than a 7-08 if that bad.