I’m kicking around the idea of going on a cow bison hunt this year, and have a .375 H&H that I haven’t used in too long, so would take it if I do decide to go on this hunt. I worked up a load using 250-grain Sierra Game Kings that my CZ550 loves, but I also have a stash of factory 270-grain Remington Core Lokt’s. Which would you use for the hunt?

I feel like either one would work, shots would most likely be under 200 yards and both are more than accurate enough, and I feel like either would hold up even on a large cow bison. But, I’ve shot one whitetail doe with the Core Lokt ammo and 0 animals with the Sierra load, so would like some opinions from someone with more experience than me!

I use the 250 grain SGK exclusively in my .375 Weatherby.

It is my bear gun. I run the 250's at 3060 fps and they are HELL for tough !!! One old boar, in particular presented a classic Texas heart shot at 50 yards. The Sierra all but came out his chest, wading nearly 7 feet of bear meat.


Cow bison ribcage shot ?? You BETCHA !!!!

I know a couple guys on another forum that went on a bison hunt a few years back and I'm thinking one used his Browning A Bolt in .270 Win. and the other used his .338x284. They both killed them I think in one shot each. According to them Bison aren't that hard to kill.

The most famous of the Alaskan brown bear guides, Bill Pinnell and Morris Talifson used CoreLokts in their old model 70 .375s for over 40 years on Kodiak Island. That's about as good an advertisement for that cartridge-bullet combination as you can get. You can read about them in the book "The Last of The Great Brown Bear Men."

I used shot 2 bison with the 270 gr Core-Lokt and one with the 300 gr Sierra used in Federal's factory load. All three bison died with one shot. Two did not appear to have an exit though I did not have the opportunity to look on the off side. I did not get a chance to look for and recover a bullet as these were animals that escaped from a stock trailer that was involved in an accident and were a danger to traffic and rescue personnel as the animals were scared and confused. The carcasses were impounded by the police and brought to a local processor for salvage per the owner's request. I didn't think to ask the butcher to look for and save a bullet if possible. These were two year old cows.

I would use the Core-Lokts myself, but I lean a little more towards Elmer's way of thinking. I have a couple boxes of the above mentioned Sierras loaded up but haven't shot anything but paper with them. They are a back up load for my back up black bear rifle.

I had a 270 GR Rem Corelok 375 H&H come apart on a Brown Bear head shot. About 15 yards shot it 2" back of bridge of nose, bullet hit an alder branch first about 3/4" bullet fragmented and fragments were found both sides of skull on . Saw bear go down then get back up pretty impressive. Early 80,s

Quit using them after that fragments looked like bird shot.

Good to hear about the 250 Sierra, I was about to recommend at least a 270gr Hornady, with 300gr Swifts or Partitions for a little extra, although the bison I've killed have been with 530gr paper patched bullets from a Shiloh Sharps rifle.