I'm reloading for a friend of mine. He has a BSA .300 Win. Mag. Older rifle but in great shape. I ned some loading data that you guys have found to be accurate. Both 150 & 180 gr. bullets.
.300 Win. Mag loads
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Dick, I never messed with bullets lighter than 180 in my Winchester Super Grade, since I have a .30/06 as well.
In my M-70, I used 80 grains of H-1000 behind the Swift 200 grain A-frame for a velocity of 2925 FPS at 15 ft, with cases being W-W , and using the 215 primer. Groups at 100 yards averaged .909" for 3 shots.
83 grains of the same powder under a 180 grain PSP Cor Lokt bullet from Remington gave an average of 3060 FPS, and an average of 1.17" for three shots. The Remington bullet is not generally as accurate as one from other companies like the Nosler Ballistic tip, so I am sure groups would be even tighter with one of them.
This rifle has a 26" barrel BTW. These were max loads I got from one of my referrence sources, and they extracted easily from the chamber. I am not one who buys into trying to read pressure signs, as it has been proven over and over to be highly unreliable. I rely more on my chrono to verify my findings against published data, and this load was right in line with that. MY chrono is an Oehler 35P BTW, and is extremely accurate and reliable, and I trust it.
IHTH,
Gun
In my M-70, I used 80 grains of H-1000 behind the Swift 200 grain A-frame for a velocity of 2925 FPS at 15 ft, with cases being W-W , and using the 215 primer. Groups at 100 yards averaged .909" for 3 shots.
83 grains of the same powder under a 180 grain PSP Cor Lokt bullet from Remington gave an average of 3060 FPS, and an average of 1.17" for three shots. The Remington bullet is not generally as accurate as one from other companies like the Nosler Ballistic tip, so I am sure groups would be even tighter with one of them.
This rifle has a 26" barrel BTW. These were max loads I got from one of my referrence sources, and they extracted easily from the chamber. I am not one who buys into trying to read pressure signs, as it has been proven over and over to be highly unreliable. I rely more on my chrono to verify my findings against published data, and this load was right in line with that. MY chrono is an Oehler 35P BTW, and is extremely accurate and reliable, and I trust it.
IHTH,
Gun
JD 500
Member
Mornin Dick,
It's not cheap, but I've found it very accurate in my bolt gun and my browning bar :
Win Brass
WLR Primer
Barnes TSX 180gr
Alliant RE-22 - 75.7 gr.
COL = 3.340"
This COL is short enough to fit the magazine and function perfectly in the bar (Autoloader).
It's not cheap, but I've found it very accurate in my bolt gun and my browning bar :
Win Brass
WLR Primer
Barnes TSX 180gr
Alliant RE-22 - 75.7 gr.
COL = 3.340"
This COL is short enough to fit the magazine and function perfectly in the bar (Autoloader).
OP
I forgot to ask. Do I need a Magnum primer? He has Remington brass I believe. And I have some 180 gr. Hornaday bullets.
Generally, yes. It all depends on what powder you use, but most anything that will work for full power loads will require a magnum primer to properly ignite the large charges we are talking about here. They are especialy important for colder climates, or temps down around freezing and below. You want your gun to go bang every time, especially on an expensive hunt.
Always follow what the manuals say to use, and most if not all, say magnums!
Always follow what the manuals say to use, and most if not all, say magnums!
