The 180 gr premium boat tail hunting bullet is the way to go on this round. You can get 3200+ fps, which gives it a good trajectory out to almost 400 yards, and a lot of long range horsepower. The ONLY reason to have this caliber is for shots OVER 300 yards.
IMR 7828, Alliant RL-25 or Hodgdon H1000 is going to be hard to beat.
Nosler's 180 gr Ballistic Tip is a very accurate hunting bullet. For big game that can bite back and MUST be anchored immediately, use the 180 Nosler Partition. Forget lighter bullets. At long range, the heavier bullet will outperform them.
Use ONLY the Fed 215 or Fed 215M. This primer was designed for the Weatherby Mags.
This is not a plinker. Without a brake, it will ring your bell. With a brake, use muffs AND plugs, and let others on the range know it is time to gear up.
Thanks for the information !! You get alot of good people here that have been there and done that.
Also I see that some loads say powder is compressed?? I see that some powders are spherical and some are long and short pelleted (extruded?) The spherical would prob not fill the case and the long extruded would or even over fill the case so you have to compress it to get the number of grains of powder needed for the load. I read your case needed to be almost full so you have good burn. Where the spherical that meters well is more dense and the case is not very full and get inconsistant burns.
I square and true the primer pockets, de-burr the flash hole, fire form and case neck trim for length and diameter... net result is three shots can be covered with a dime when shot at 300 yards (if I do my part) - done it once or twice with five shots too.
I've had good luck with MRP and any of the slow burning IMR powders - I agree you want a full case (I would rather compress the powder than not) and I too am partial to the Federal primers. I've not tried it, but I've a friend who swears by the Vita Vouri powders for this round.
My rifle likes anything from 150 grains and up (cartridge LOA can interfere with really heavy bullets - 200+).
This cartridge has a lot of free bore and playing with how deeply you seat the bullet can turn a lousy round into a tack driver (and vice versa).
You'll need to experiment with your rifle - what works for me may not work for you...
Find a load where the powder fills the case to the base of the neck. It's easy to check the cases after you drop the powder to see if you have the right amount in the case. And after you seat the bullet you will have little or no air space. HMB
I also found IMR 7828 to be the best for Weatherby cartridges. I load 85 grs. of IMR 7828 with Fed 215M primers, Weatherby brass, and 180 gr. Nossler Partition bullets. They Chronograph 3222 fps and shoot 2 inch, three shot groups at 300 yds, calm day, in my Weatherby Mark V with 26 inch barrel. BRGII
I reload for the 240 Weatherby Mag and the 270 Weatherby Mag and have found that the most accurate loads are found on the NORMA website. All factory Weatherby ammo is loaded by NORMA. The powders amd primers they use I have found are the most accurate.
Click on the above website.
The info on the website is in 3 differint lanques, so if you surf the site, in the upper right hand corner are three flages, for English click on the British flag.
IMR 7828, 180g Speer GS, Federal Magnum primer, and Remington cases. This is the only load my rifle will shoot. I thought I was going to wear the barrel out before I found a load. It will shoot three touching at 100 yds.......Roger