300 Weatherby, 180gn Nos AB, CCI250, H1000 in Mark V

[tpe187]

New to me 1984 Weatherby Mark V 26" in 300 WBY. Pleasantly surprised that the first factory load I tried (Weatherby 180 TTSX) shot 3/4" groups at 3200fps. More surprised that I found a great load within 10 shots of initial load development with H1000 and 180 Nosler Accubonds printing .462" for 3 shots with an ES of 2.6 and SD of 1.1, and an avg velocity of 3237fps. I will need a larger sample size and need to stretch the legs a bit, but I'm very hopeful.

 

[Str8meat]

Here’s another to look at , 300 wby, 200 grain partition 83 grains imr 7828. 3040 fps. I also get the same results with 81 grains of h1000 and a 200 grain accubond. Speeds within 2 fps of each other on powders. Weatherby brass , fed 215 gm primers. She’s a shooter.

 

[Luvthunt]

Used a 300 Wby for many years . Great cartridge

 

[tpe187]

Here’s another to look at , 300 wby, 200 grain partition 83 grains imr 7828. 3040 fps. I also get the same results with 81 grains of h1000 and a 200 grain accubond. Speeds within 2 fps of each other on powders. Weatherby brass , fed 215 gm primers. She’s a shooter.

Yep, 200gn accubonds are next on the list. Haven't been able to locate any 7828 or fed 215gm, but I'll get there eventually. Thanks for the information!

 

[Str8meat]

7828 has been “ discontinued “ I have 100 rounds of that recipe,loaded already for the fall. Also an additional 150 of the h1000 recipe.

 

[tpe187]

7828 has been “ discontinued “ I have 100 rounds of that recipe,loaded already for the fall. Also an additional 150 of the h1000 recipe.

Are they still making the SSC version of 7828?

 

[Str8meat]

if you find some it would be a good idea to buy it. I haven’t seen any in 4 years. My main elk rifle is a 338 rum 225 accubond at 3050 fps fueled by 92 grains of 7828. Been my go to load for 20 years and now it’s not available.

 

[Ray B]

The three 300s that I have had, a SouthGate FN, A Mauser barreled by Harry McGowen and another by CP Donnelly all did very well with H 4381. But in deference to the machined lower lug I loaded the 180 grain BBCs to 3100 fps.