Home Forums Reloading Big Game Rifles 270 and 150gr Partitions

I'm sad to say that I've yet to get anything promising out H4831. But this is a completely different rifle to me and I will try it.

BB,
I will get some 7828. Thanks

Try RL22 and RL17 before giving up.

I've not had the results others have said in 3 Rem M700s with H4831 myself. I haven't tried it much in my FN M70 yet but as mentioned, before you give up, try RL22, it's given me both better velocity and accuracy in those three rifles. It's the first powder I try in 270s, the second is Ramshot Hunter then probably Magpro.

H4831 never really impressed me in a 270 either. 7828 gets me the speed I want. Mag pro gets some decent speeds too. Back in the day I ran a little RL22 also. I'm not really a big 270 fan but one or 2 always seem to sneak into my safe.

A few years back I put one of my Alaskan Ti fluted take off barrels in 270 on an sps action and stock for a friend. He told me he wanted a load that would do anything for him. First thing I tried was 150 npt over 7828. It was clocking almost 3000 from the 24" tube and grouped around 3/4 moa. I loaded him 100 rounds and called it good. First year out he shot a decent buck on the run about 150 quartering away and said it flattened it. His brother and friend were so impressed they both used his rifle to shoot bucks the same day with the same result. Later in the year they shot some cow elk with it. He has a lot of rifles but that's the only one he hunts with now.

I just still can't bring myself to like a 270. Mainly because that's what my stepbrother always shot and he was such a douche about it. That and the whole BC thing. I do need to get the t3 stainless out again and see what it'll do. I just bought it because it was like new for $460.

Bb

Shag, when I got my Kimber 84L MT in 270, I only shot 150's in it (both Ballistic Tips and Partitions) and H4831sc gave me good speed, but not great accuracy. I switched to H4350 at Dober's suggestion and groups shrank considerably.

In past 270's, RL22 always worked well, and RL17 too. However, H4831sc would always be my first choice.

And BTW, a 150 NBT or NP is great elk medicine!

I have found loads that shoot with h4831 in the .270, but it has been more finicky in my rifles. I too have consistently gotten better results with rl22 and Hunter and with higher velocity.

One other comment on rl22, It was once the only powder I used in .270 and .300s, but have seen bigger pressure swings than with h4831, h4350 and Hunter or most other powders I use when it gets hot. I had a load that was a little below max with 140s and getting 2890 or so at 70 degrees that at 102/103 was doing 3150 with pressure signs out of a 22" barrel. I had to drop 3 grains with rl22 in the summer to get the same velocity. Of course, I have seen pressure move with heat with other powders, but not to that extent. In order to get year-round performance, I generally run a grain or two below max at mild temperatures with most powders and use rl22 less than I once did.

Brad, I may hit you up later on loads with H4350 and the 150gr partition. I have a chit ton of IMR 4350, so that's what I'm using at the moment. I'm heading out to the range with my 270 here in a bit to try out my new Mcmillan

FWIW BSA,

With the 150gr Partition in a 270 Win. I usually start around 50.6grs and work up to around 52grs of H4350, with most rifles I have played with a sweet spot will generally show up between 51-52grs in Remington or Winchester brass over a Fed.210 or Win. LR primer.
Usually very good accuracy but don't expect the velocity you can get with the slower powders......
Good Luck,
-Ted

57 gr RL-22 and the 150 NPT's are stoners on deer and pig sized game, they av. 2925 from my pre-64 when lit with CCI-250 mags in WW hulls.

My fav 270 load by far.

Gunner

gunner this sounds like it might also be a good black bear load for my spring hunt... Thanks..

10-4 WCH, believe I read where Bear in Fairbanks has used that load for elk too, and he said it flat works.

Gunner

Good information.. Thanks again..

Gunner: Sorry, I've never used that load on elk. Only caribou & of course, sheep. I wouldn't hesitate to use it on Alaskan moose
but haven't done that yet. Use my .338 WM for them. My B.I.L. is putting together a group hoping to draw a party tag for Oregon elk.
If we get drawn, I'm planning on loading up some 150 NorthForks for the .270 Win. and using that. For me, experience has shown that NF's are slightly more accurate and they work at least as good & maybe slightly better than Partitions. Load workup for them is easy & straight forward.
Good luck,
Bear in Fairbanks

OOPS , wish I could use the search function and find who wrote and told me that, sorry.

Gunner

I seem to remember an article by JOC where he hunted with Bowman in Wy. and killed an elk with his .270 and 150 grain Noslers at something right around 400 yards... I may still have the article.

The recent posts on this thread about not getting very good accuracy with H4831 and 150-grain bullets are interesting.

I first started using that combination in 1979, with the last of my supply of the original mil-surp H4831 and 150 Hornady Interlock, and my first .270 (a Remington 700) shot that combination great. In fact it would do around an inch or a little more at 300 yards for 3-shot groups.

Have gone through two other versions of H4831 since, the Scotland-made powder that replaced the mil-surp, and the present Australian-made version, both short-cut and "long-cut." In 10 .270's since ALL the 3-shot loads at 100 yards have averaged .95 inch. Not all were shot with Nosler Partition, but quite a few were; the other 150's were Hornady Interlocks, Sierra GameKings, and Nosler Solid Bases and ABLR's.

That includes the groups with one of the rifles (my second pre-'64 Model 70 Winchester) didn't like the Partition very well, averaging around 1-1/2", but the others all shot it well, but it shot the 150 Interlock into 3/4". And one of the rifles was a Remington 760, which shot 150 Partitions into a little over an inch.

My present .270 is a CZ 550 that in early experimentation with H3831SC and the Nosler 150 ABLR averaged .79. This was with the first seating depth and powder charge tried, so imagine it will do better with some tweaking. Will see between now and the fall hunting season.

I have only used the Australian powder in 270, but have had fewer loads shoot well with it than other powders over five or so 270s. I have a ULA that would only do about 3" three shot groups with 150 NPTs with H4831. I thought it didn't like partitions until I loaded three or four powders with 150 NPTs and went to the range. It turns out it didn't like 4831 with partitions of any weight. Over about 10 groups that day it averaged about 3/4" with other powders. The ULA is also the ONLY 270 I have ever owned that would shoot 130 Hornadys with 4831, but only with 59 grains. The other four have only shot that bullet well with Hunter or rl22. drop the charge a little or go up to 60 of H4831 with the Hornady in that rifle and it opens up to about 2.5". In fact, the above mentioned are probably the only two loads I have ever had shoot poorly in that ULA for me.

Good thread guys. Good info..

I know H4831 is a great powder in the 270. Many others with a lot more exp than I have have had great results...it's just never worked as well as some other powders for me for some reason....as much as I want it to.