270 Winchester reloading

mosinmaster

mosinmaster

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Hi,

I just got a R700 Mountain Rifle in 270 Win that I want to work up a 150 grain load for. I will be reloading for the Nosler 150gr BT and 150gr Partition.

I've been doing a lot of reading to pick the best powder. IMR, Hodgdon 4350 vs 4831 seems to be really popular, as well as RL-22.

For my specific rifle and bullet weight, based on your guys' experiences which type of powder (4350 vs 4831) is better, and can somebody explain the differences between Hodgdon's powder vs IMR.

Lastly, I also want to reload for my 30-30 Winchester and 8x57mm. Of the two powders above, have any of you had experience using them in these calibers as well? I'd like to consolidate a powder for all 3, but if not, I'd like some recommendations for powders that I can also pick up in one bulk buy. I was thinking IMR 4064 for these 30-32 caliber cartridges. I like shooting 170gr bullets in my 30-30. What do you recommend? And for the 8mm mauser I want to shoot 200gr bullets, I was thinking a Nosler Partition.

Thanks in advance!
 
You will get a bit more speed with the slower powders but my 150 gr loads have been the most accurate with H4350.
 
Check out Nosler's load data. They show 52 grains of H4350 with the 150 grain slugs as the most accurate load. That is the maximum load. I had good luck with H4831 but had to go two grains above Nosler's max of 55 grains to get good groups. H4831 who sadly is not with us anymore, indicated 57 or 58 grains of H4831 with the 150 grain bullet in the 270 and he was right in my rifle anyway.
 
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In my experience H4350 is a great powder and I have had the best results around 52.0 grains behind a 150 grain bullet.

H powders I believe are slightly slower burning than the IMR powders.
 
My .270 win pet load is a 150 grainer pushed by 57 grains of IMR7828 and a magnum primer. Works great in both my .270 win rifles with Hornady SSTs and Speer Grand Slams. The SST in particular shoots 3/4" at 100. The Grand Slam is not much worse and still plenty accurate for hunting.

I wouldn't hesitate to try it with 150 Partitions, but I would of course start lower and work up to 57 carefully.
 
Varmit said:
Check out Nosler's load data. They show 52 grains of H4350 with the 150 grain slugs as the most accurate load. That is the maximum load. I had good luck with H4831 but had to go two grains above Nosler's max of 55 grains to get good groups. H4831 who sadly is not with us anymore, indicated 57 or 58 grains of H4831 with the 150 grain bullet in the 270 and he was right in my rifle anyway.
Click to expand...

I agree with this, I use H4831sc with 130 gr bullets, 60gr of it. So I would think 57-58 gr with 150gr bullets is in the ball park. Mr H4831 knew what he was talking about and so did Jack O'Connor. :)
 
I was using 58.5 gr. of H4831SC under a 150 gr. Nosler Partition when I had mine. I still have some of the ammo around, but sold the rifle.

For the .30-30 I would suggest getting a pound or two of Leverevolution.

The 4350's, either IMR or H, would be fine for the 8x57.
 
The first group with the Nosler loading of 52.0 Grains of H4350 with Partitions was 1.4" at 200 meters.
Nosler has maintained this loading as the most accurate loading and powder for over 25 years.
Worked in my Remington 700 Classic and a friend's Winchester 70.
Interesting but it is the slowest of the Nosler loadings but it can be pushed.
 
horseman2 said:
The first group with the Nosler loading of 52.0 Grains of H4350 with Partitions was 1.4" at 200 meters.
Nosler has maintained this loading as the most accurate loading and powder for over 25 years.
Worked in my Remington 700 Classic and a friend's Winchester 70.
Interesting but it is the slowest of the Nosler loadings but it can be pushed.
Click to expand...

Just to be sure, is that is with the 150 grain projectile?
 
Been loading 150gr Hornady's over 56 grains IMR 4831 in my 270 Mountain rifle since I got it in 1990...shoots sub MOA at 2900 fps.
 
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Thanks everybody for your help in getting me started with reloading.I put together a batch of 270 loads for my Rem 700 Mountain Rifle. First group of the day was 53.5gr and it was en route to a 0.5MOA group until the flyer made it 1MOA at 100 meters. 54.0gr was a decent hunting accurate load. I think I pulled two of the shots, but otherwise it could be also a decent 1MOA load with higher velocity. 54.5gr seems to open up more, and look like a 1.25-1.5MOA group. All are accurate enough for hunting.

Next step is to neck size the brass for increased accuracy after fire-forming. I will load up more 53.5gr and 54.0gr and shoot them at 100 and 200 meters now. Also will chronograph for velocity. Looks like I'll have a good whitetail and mule deer load for the fall!

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Best results with IMR4350 Rem brass with powder charges from an old Hornady manual. 54 gr worked well with the 150 in my rifle.
 
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