Any 300WinMag plinking loads?

Jonny2guns

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Nov 28, 2020
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Wasn't planning on working up accurate loads for the win mag at this time, but the glass I bought for my model 70 doesn't fit, but it fits the win mag.
 
Buddy of mine ran H4831 and a 195 bthp. He also ran a 190? Eldx(maybe 200?) memory ain’t rememberin’. Think he messed with h1000 but did a lot with 7828.
 
Cheapest plinking load I've found is 180 Interlock blemished and Sw4350.
My hunting load is H1000 and 200eldx.
H4831sc, Imr7828ssc, H4350, Retumbo, RL22 have all worked great for me, but H1000 is my favorite so far.
 
Reduced loads for the 300 Win Mag can be assembled with H4895 using Hodgdon's reduced loading guidelines for H4895.

If you can find an old IMR loading guide, it had some lower velocity loads using their faster rifle powders. I used IMR4198 in the 338 Win Mag with such data and had good results.
 
I'll watch this with interest. I've wanted to work up a 308 level load for my 300wm for awhile but never got round to it.

My hunting load is 70 couple grains of 4831sc under a 180gr nosler etip. It's accurate, and decisive on elk.
 
My .300 is a .300RUM so is a different animal.
My “Economy” load isn’t exactly a “plinking” load.
In 2006, I bought 16lbs of WC-860 pull-down from .50BMG loads for $80.00.
(About what a single pound of Reloader25 sells for now !!!)
It’s analogous to the old H870 surplus powder and works splendid in the .300RUM.
I worked up to 108gr for 3,350fps with some Remington 180gr Corlokts I bought for $5/100. I bought 1,000… I cut back to 105.0gr as it is more accurate at 3,250fps. I’ve taken a couple of deer with it and it’s not as destructive as you would think.

Closer to the .300WM, I acquired a .375Ruger. Brass was hard to source at the moment. I found that I could form a “useable” case by running the .300WM through the .375R die to expand the case neck. I expanded them with a 10gr load of Bullseye and a wads of tissue paper. Later I flared the neck with a Lee Universal expander and seated a Lee 255gr cast .377” bullet over 10.0gr of Unique. This gives about 1,100fps and is a marvelous plinking load. Much better than a .375” round ball over 5-7gr of Bullseye.

The Lyman Cast Bullet Manual has a number of reduced cast bullet loads using various cast bullets and pistol powders.
 
30cal gas slow cost bullets that's usually in fmj's. I have fmj's in 30cal weights if 110, 123, 125, 150, 170 and 185. Primers are almost the cost (maybe half) of the cheaper 1's. Average cost to plink 300wm with (lets say) 70gr ~85 cents.
 
My .300 is a .300RUM so is a different animal.
My “Economy” load isn’t exactly a “plinking” load.
In 2006, I bought 16lbs of WC-860 pull-down from .50BMG loads for $80.00.
(About what a single pound of Reloader25 sells for now !!!)
It’s analogous to the old H870 surplus powder and works splendid in the .300RUM.
I worked up to 108gr for 3,350fps with some Remington 180gr Corlokts I bought for $5/100. I bought 1,000… I cut back to 105.0gr as it is more accurate at 3,250fps. I’ve taken a couple of deer with it and it’s not as destructive as you would think.

Closer to the .300WM, I acquired a .375Ruger. Brass was hard to source at the moment. I found that I could form a “useable” case by running the .300WM through the .375R die to expand the case neck. I expanded them with a 10gr load of Bullseye and a wads of tissue paper. Later I flared the neck with a Lee Universal expander and seated a Lee 255gr cast .377” bullet over 10.0gr of Unique. This gives about 1,100fps and is a marvelous plinking load. Much better than a .375” round ball over 5-7gr of Bullseye.

The Lyman Cast Bullet Manual has a number of reduced cast bullet loads using various cast bullets and pistol powders.

I have a good bit of unique maybe I'll give that a try. I also found this a couple of years ago, don't know if it will work. 20240428_151050.jpg
 
I have a good bit of unique maybe I'll give that a try. I also found this a couple of years ago, don't know if it will work. View attachment 1206960
That’s a great powder and has been unavailable for some time.
Note that it’s roughly IMR 4320 to 4350 speed. It’ll peak on pressure rather quickly. However, with H414 data reduced it’ll likely give excellent results with the jacketed bullets.
 
That’s a great powder and has been unavailable for some time.
Note that it’s roughly IMR 4320 to 4350 speed. It’ll peak on pressure rather quickly. However, with H414 data reduced it’ll likely give excellent results with the jacketed bullets.
Good to know, thanks for the info.
 
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