257 WEATHERBY

[coyotehunter4]

I just got my MGM 257 Weatherby barrel for my T/C Pro Hunter. Getting ready to start working up a load. Just wondering if anybody had a pet 257 load for a starting point. Looks like a good powder to start with is IMR 4831, of coarse I don't have any. Something else to buy.

 

[VinceU1]

I don't remember how much powder I used, but I was getting almost 3600fps with Reloader22 under a 100gr Nosler BT. It was an absolute laser against Antelope all the way out to 800yds or so. It was pretty close to a max load though.

 

[Yeah]

75 grains of Reloader 22 gets a moly coated 85 TTSX nudging 3800 fps in both the 257 Wbys I have left.

Lots of boom, but serious medicine for anything you might point it at.

 

[Broom_jm]

While either flavor of 4831, along with RL22, will make useful loads with the 257 Weatherby, you're really better off with even slower powders. H1000 is a good choice, as is IMR 7828. If you can get your hands on MRP 2, it has a near-optimum burn rate for this highly over-bore cartridge.

I hope you got a 26" or 28" barrel, to make the most of this big-jugged quarter-bore.

 

[VinceU1]

While either flavor of 4831, along with RL22, will make useful loads with the 257 Weatherby, you're really better off with even slower powders. H1000 is a good choice, as is IMR 7828. If you can get your hands on MRP 2, it has a near-optimum burn rate for this highly over-bore cartridge.

I hope you got a 26" or 28" barrel, to make the most of this big-jugged quarter-bore.

Holy Moly, and I thought RL22 was slow enough!!! Oh well, yes the .257Weatherby is good for anything from 'lopes to smallish elk. Never took an elk with it, but the ex-wife did once. She loved that Weatherby, as it's really light on recoil also. If you're going for bigger animals, you might want to take a hard look at the Nosler 120gr partitions, they work very well and have no problem giving an inch at 100yds.

 

[fireball168]

It works well for groundhogs too.

Check your freebore/throat length before you start loading.

 

[Dewidmt]

I've always used IMR 4350.....a dose of that and a Nosler 115 gr Ballistic Tip worked well on my Mule deer and Antelope kills.

 

[coyotehunter4]

While either flavor of 4831, along with RL22, will make useful loads with the 257 Weatherby, you're really better off with even slower powders. H1000 is a good choice, as is IMR 7828. If you can get your hands on MRP 2, it has a near-optimum burn rate for this highly over-bore cartridge.

I hope you got a 26" or 28" barrel, to make the most of this big-jugged quarter-bore.

26" Barrel Thanks for the input. I have never seen MRP 2.

 

[Broom_jm]

26" Barrel Thanks for the input. I have never seen MRP 2.

In all fairness, I'm not even sure they're still making it.