We South Africans are having to make the transition from our local powders to foreign powders, a job that is a headache for someone who loads out of necessity and not passion.
S365 works well for 130 gr bullets, but the slower S385 for 150 grainers. For 140, my rifle likes the S385.
I have searched these forums and the internet extensively for information and it appears as if H4831 is the best overall 270 powder.
(Realistically, we will have access to Hodgdon and IMR powders.)
Question: which H or IMR powder would you use for the "inbetween" 140 grainers?
Thanks.

TRY R26 3100 with a 150 gn proj

4831

quote:

Originally posted by butchloc:
4831

Would that be Hodgdon or IMR?

Between the Hodgdon and IMR versions of 4831 I'd pick the one that shoots the best in your gun. If limited to one or the other I'd go with the Hodgdon short cut version of H 4831. It's marketed as H4831sc.

H4831 or 4831SC.

You might try IMR-4831. After many years of using Hodgdens, I've found I like IMR even better.

Thanks for all the input.
All things being equal I will start with H4831 and then H4350 and IMR4350 if needed.

Karoo, I haven't heard of the S powders you've mentioned, and don't see them listed in any burn rate tables. Are they strictly local powders in S. Africa? With the Alliant powders, in addition to RL26 mentioned by M 98, RL22 has produced good results in a lot of 270s. And Vihtavuori N165 and double-base N560 are in about the right place in the burn rate table, a little slower than the 4831s, but great powders, particularly with heavier bullets.

Thanks South. Yes, the S Powders (Somchem) are strictly South African, but supply is becoming unreliable.
I have seen Vihtavuori, IMR and Hodgdon on our local shelves (I live near a small town) but they are considerably more expensive than the Somchem powders.

Hybrid 100 V.. for the 140gr bullets work extremely well out of my model70, groups were better than with H4831sc that I have used for years. Velocity was a 100f/s faster
I have only used it for two years mostly in cold weather.

quote:

Originally posted by Sagebrush Burns:
You might try IMR-4831. After many years of using Hodgdens, I've found I like IMR even better.

WARNING: IMR 4831 is significantly faster than H4831. Adjust loads accordingly.

I can't believe that no one has recommended IMR 7828 SSC. I've found it to give somewhat more consistent velocities and accuracy than the currently manufactured H4831 from Australia. My loads with 7828 run about 3% heavier than H4831 for similar velocities.

you can never go wrong with H4350 in 270 win.
130's to 150's

If I were loading out of need rather than pleasure, I'd use IMR or Hodgdon in either 4350 or 4831 and just spend a few hours to find your load that works without excessive pressure in hotter weather and then stick with it.
All 4 of those are excellent powders for almost any bullet weight in the 270 Win.

Zeke

H4831 is as good as it gets for the 140 grain 270Win load, but sometimes I have had to try different primers.

quote:

Originally posted by vines:
you can never go wrong with H4350 in 270 win.
130's to 150's

Exactly.

quote:

Originally posted by South Pender:
Karoo, I haven't heard of the S powders you've mentioned, and don't see them listed in any burn rate tables. Are they strictly local powders in S. Africa? With the Alliant powders, in addition to RL26 mentioned by M 98, RL22 has produced good results in a lot of 270s. And Vihtavuori N165 and double-base N560 are in about the right place in the burn rate table, a little slower than the 4831s, but great powders, particularly with heavier bullets.

South, I found this burn rate comparison chart from Peregrine Bullets made in South Africa. It will give you an idea of where Somchem fits in.

http://peregrinebullets.co.za/...ness-Chart-Rev03.pdf

Then as per the chart of "Relative" burn speeds H4350 would seem to be the best choice to start with, as it shows a slightly slower burn then the IMR which should give you a slight latitude on pressure.

go to or workable?
basically i use h335 for "Everything" - and have used from 223 and 7.62x25 all the way through the 550 magnum - why? during the Obama Admin, i had to simplify my reloading options, and found that h335 worked "good enough" for everything, and with a little tuning, stayed accurate and delivered more than acceptable results

so, to keep it simple smith, i now only use h335 - one powder to learn to read the primers, and easy peasy to buy a jug, rather than 8x1# cans of differing powder .. therefore cheaper, too..

I use RL23 as my go to powder for the 270 Win and 140gr Accubonds or Trophy Bonded Tipped I us same load for both. Second Choice is Spuerformance. For 150gr Nolser Partitions I use Norma MRP. RL26 will be fastest in both bullet weights but little less accuract. Plus RL23 is one of the most temperature insensitive powders on the market. Works good in my 7mm Mag as does MRP .

Karoo,

H4831SC very closely followed by N165.

You will get higher speeds with others like Re23 or N560 but the accuracy and stability H4831SC and N165 has given me in my two .270s is absolutely unbeatable.

And I am no longer concerned about maximum speed.

H4831 is very hard to beat for a number of reasons. Ballistic performance and availability come to mind. Especially if loading out of necessity. R26 works well too. Cheers.

H4831 is the historically number 1 .270 powder, and the early WW2 4831 is even better, but hard to come by..I have about 40 pounds of that stuff that's clean as can be, more velocity and less pressure..4350 to a lesser degree perhaps?

The down side is that stuff measures horribly, cuts grs. and you need to weigh your loads I suppose, some do and some do not..

Today I prefer RL-22, and RL-19 it gives me plenty of velocity and measures thru my powder measure so well that no need to weigh charges if you have a good powder measure and know how to use one..and its accurate as can be..

RL23 with 140gr Bullets,
RL26 or MRP with 150gr bullets.

I have used IMR 4350 for many years for all my .270 loads, but it is rather temperature-sensitive and may not be a good choice for African temps. In the last couple of years, I started using IMR 4451 in my 140 grain loads and am very happy with it.

quote:

Originally posted by vines:
you can never go wrong with H4350 in 270 win.
130's to 150's

My thoughts and experience as well!