30-378 Weatherby Magnum

(7 customer reviews)


Originally billed as the world’s fastest 30 caliber cartridge, it will push a 30 caliber bullet 3,500 feet per second.

SKU: 30378 Category: Tag:


Ammunition Shipment Restrictions

Must be 18 or older to purchase rifle ammunition. Shipping not available to P.O. Boxes, International Addresses, AK, CA, HI, MA, CT, IL, NJ, NY nor DC residents. Residents of DE, KS, OH, and WA may have additional restrictions. All ammunition is shipped domestic ground and an adult signature is required. We do not accept returns on ammunition.

Limit 5 items per customer per purchase.

Initially a wildcat cartridge developed by Roy Weatherby in 1959 at the request of the United States Army. This white-hot cartridge is based on the 378 necked down to 30 caliber and packed with powder. Originally billed as the world’s fastest 30 caliber cartridge, it will push a 30 caliber bullet 3,500 feet per second. Reintroduced as a Weatherby production cartridge in 1996.

Additional information

Weight N/A
Dimensions N/A

165 Grain Nosler BST, 180 Grain Barnes TTSX, 180 Grain Nosler Accubond, 180 Grain Nosler Ballistic Tip, 180 Grain Hornady Interlock, 220 Grain Hornady ELDX, 165 Grain Barnes TTSX, 200 Grain Nosler Accubond, 195 Grain Hammer Custom, 180 Grain Nosler BST, 200 Grain Partition, 180 Grain Scirocco

7 reviews for 30-378 Weatherby Magnum

Based on 7 reviews
  1. Roger Richardson

    Purchased my first MARK V IN 1976 in .300 Wby Mag, bought three more in different calibers before buying a .30-.378 which was the first one I saw at the Powder Horn in Bozeman, MT in 1996 while on a hunting trip. Put a Leupold Mark 4 on it and have never been disappointed! I use my .300 more than any other caliber, but nothing compares to the .30-.378 on hunts that I expect longer shots. In my many years of hunting, I’ve never shot at an animal that that didn’t come home with me. Most fell nearly where shot, none took over a few steps!
    There are so many good calibers out there now to choose from, some of which I’ve tried. But none that please me as much as either my .300 or .30-378
    Wby Mags. I’ve truly been a Weatherby man for life, and it’s been a very good life! Thank you

    (5) (0)
  2. Steve Frisby

    Amazing long range rifle. I have taken whitetail, mule deer, elk and moose with 180 gr Accubond from 15yds ( moose) to 1013 yds elk. My go to rifle is my Weatherby 30-378.

    (4) (0)
  3. BRUCE WISKUS (verified owner)

    I have been shooting the 30-378 since 2005 excellent flat shooting hard hitting round. Have taken elk,mule deer and whitetail out to 600 yards no problem. Grandchildren are using it now and arguing about who is going to get it when I am gone.

    (2) (0)
  4. Coonhhuter

    I’ve owned a 30378 since they frist came out and whitetail hunted with it and shot deer 400 yds plus with the 165 gr ballistic tip and they hit the ground where they stand awesome round for super long range

    (2) (0)
  5. F Vic

    Shot 4 Elk 1 Moose all over 350 yards , and one large brown bear all one shot kills. 30-378 is flat shooting hard hitting ….

    (7) (3)
  6. Outbackjack

    Have a MK V in 30-378 set up by Long Range Hunters in WY with a Huskama scope using the 165gr TXS.for my South Dakota 1000 yard rifle. Less than 1′ groups at 200 yards and ground pounds everything. I’ve used it to take whitetail out to a half mile with zero misses and dropped in their tracks. Luckily I purchased five boxes of ammo with gun (when ammo was $15 cheaper) and still have 3+ boxes left after LRH used 14 rounds to set up rifle, 6 on deer and the rest for practice.

    (2) (0)
  7. shady04

    I have been trying to purchase Weatherby 30-378 130 grain TTSX ammo for months. Why is it so difficult to find? If it’s not available at Weatherby.com, there’s a problem.

    (5) (1)
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