Home Forums Hunting & Shooting Ask The Gunwriters 7mm Weatherby Magnum

I just purchased a Weatherby Mark V Deluxe in 7mm Weatherby Magnum. I would like to get everyone's opinion on the cartridge (good or bad) and get some load data. I am really looking forward to shooting this rifle, it is beautiful. Thank you all in advance.

Nothing but good from this cartridge.

Best of the 7's for my buck.

You can neck up Nosler 270 Wby brass.

My 7 Wea. is on a 700 action.. I seat a 160 Sierra HPBT flush with the bottom of the neck of the case.. I am not sure a Wea. rifle will permit that.. But it has been a heck of a fine rifle.. Built it as a long range coyote rifle, but we have killed antelope, two kinds of deer, elk, and moose with it.. A great caliber.. If I were not into the .30 cal. so much it would be my pick for big game.. I believe the little I tested 140's I got about 3,500 fps.. But would have to check my notes.. Part of the success of the rifle is that long magazine box on the Rem. action.

Or 7mm Rem brass.. That is what I did comes out a bit short and eliminates the need for trimming..

Cartridge is capable of great things..the rifle...not a fan. Just me.

Check the twist rate and lead length, then get back.
I`ve been loading and shooting this cartridge for a few years now and love it, but understand some that were made in Germany have slow twist rates, and short leads...that`s why I asked. My loads could cause problems in your rifle....Noslers No.6 loading manual has good updated charges in it.
Shoot heavier bullets in mine, really like Sierra`s 175 at 3040, and 162 SSt`s at 3200. to name a few.

I haven't loaded any in quite a while, but one thing I do remember from those days is the 7mm Wby's extremely consistent chronograph readings.

I had one years ago.Loaded 175 gr and 160 gr Sierras with H4831 powder. Could never get it to shoot good. Maybe it was the twist rate. I didn't know about those things 40 years ago . I killed a few elk with it.It worked is about all I can say.

I agree. The real problem as I see it, are primer pockets...push the cartridge too far, and you loose cases. So I learned not to go full bore, watch the cronie for sane reasonable loads and be happy!

My rifle was made in Japan, it has a 26in bbl and I believe it has the 1/10 twist rate.

The cartridge is as good as any for almost every type of big game. While I've not had this 7mm, I have had the 270 Wby and the 300 Wby and spent a lot of time with the 7 mmRem Mag.

The Mark V Deluxe is a bit beefy for my tastes but it should serve very well.

Disclaimer: I am not a gun writer.

My Wby Mk V in 7 Wby wears a custom kevlar stock. Scoped with a Swarovski it weighs 8 lbs. so it is no where near taxing to carry. It is accurate with its 24" barrel. I had it cut 2" before I ever fired it.

I really love the gun. I have a load that I discovered will shoot 1/2 MOA in any of the seven or eight 7 Wby's I've fired it in. It's the first one listed below.

70 gr's RL 22
140 Accubond
3050 fps

74 gr's RL 22
140 Accubond or TTSX
3400 fps

The 24" barrel will push 120 TTSX's to 3650 fps at 1/2 MOA. It will push 160 Accubonds to 3187 fps. Not much the round won't do.

I will soon rewire those loads with RL 23.

I also have a 7 Wby barrel for my Encore. I have taken several animals with it. I really like the round.

Bought mine in 1968. Made in Germany, paper thin 26 in barrel. Real accurate. Sold it to my BIL when I needed money during a divorce 37 years ago. He still has it, still shoots great, want sell it back. Hasbeen

It seems to me that one of the gun heads here has a custom 7MM WBY with a bull barrel...

Great rifle, great cartridge...very accurate, especially with 160 grain Partitions. One grain less than max in the Nosler Manual of IMR 4831 with Fed. 215 primers. If you like 7mm's you won't go wrong with this one.

Great cartridge, I use reloader 22 with 140's

You just wrote about guns.

Even from experience.

You're an experienced gun writer .

I used to own a 7mm WBY Accumark, it shot good, not great with WBY factory 160 Nosler Partitions. I killed one elk with it and a friend talked me out of it!

That might be disputed. 😉

I'll join the general chorus and say it's a great round--with one caveat.

Had an ULW Mark V in 7mm Weatherby for a while. It shot great with ammo it liked, whether factory or handloads, and mostly reached advertised velocity with factory ammo, and often exceeded it with published handloads. It was easy to match the 3200 fps factory velocity with the 160 Partition--and factory accuracy, which was excellent.

However, the rifling twist was 1-10, which may or may not have had anything to do with generally mediocre accuracy with longer, high-BC bullets. The long "freebore" throat may have had something to do with that, as in general that sort of bullet has shot less accurately in freebore Weatherby rounds--though not always.