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Campfire 'Bwana
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Campfire 'Bwana
Joined: Jan 2007
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bsa: Just like the 130, with the 150 in the 270 I would start with H4831.
The other "old" JOC load was 58.5 WW II surplus H4831 with the 150 Nosler Partition for a bit over 2900 fps from a 22" barrel. He used that load in Africa, India, and other hot places without incident.
I used the same charge from the 22" Douglas barrel of a Dale Goens rifle and it gave the 150 gr a hair over 3000 fps.
The H4831 we have today is a bit faster burning....(I think..some are finding it slower but I have not seen this) than WW II version.
I also would try 7828,but have only used it with 130's myself.
The 280 Remington is overbore.
The 7 Rem Mag is over bore.
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Joined: Jul 2001
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Campfire Kahuna
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Campfire Kahuna
Joined: Jul 2001
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Bob,
My present lot of H4831SC is somewhat slower than my remaining batch of the original mil-surp powder.
The only .270 I own anymore is one of the recent O'Connor "Tribute" Model 70 Featherweights. As an experiment, I tried some of the original H4831, side-by-side with the new stuff, with 130-grain Hornady Interlocks, using the same 61.0 grain charge. The old H4831 got 3118 fps, while H4831SC got 3029. This was during the same range session, over the same chronograph, with the two strings shot one right after the other. The rifle will easily handle 58.5 grains of H4831SC with the 150 Partition, and velocity isn't quite 2900 from the 22" barrel.
I suspect the answer depends on the manufacturing lot of each powder.
“Montana seems to me to be what a small boy would think Texas is like from hearing Texans.” John Steinbeck
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Joined: Jan 2007
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Campfire 'Bwana
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Campfire 'Bwana
Joined: Jan 2007
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John thanks that's interesting. I have so much of the H4831 that I have not purchased any recently. I have been using the 61 gr load for at least a decade now with the 130 NPT.
If some lots are slower now we may be working our way back to how it used to be ? Looks like maybe even slower, as you guys are seeing! pretty neat!
The 280 Remington is overbore.
The 7 Rem Mag is over bore.
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Campfire Regular
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Campfire Regular
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About 2 years ago I used a then-current batch of H4831SC, 61.5g of it with a 150g SST. It was so compressed it pushed the bullet out a little overnight.
Compared to many manuals I thought the velocity was very mild. 2990fps from the 23.5" bbl.
When I mention manuals, I mean that I don't remember ever seeing a 61+g load of that powder with a 150g bullet.
I worked up to the load gradually of course. Lighter powder charges had been very underwhelming.
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Joined: Mar 2006
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Campfire Ranger
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Campfire Ranger
Joined: Mar 2006
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A LOT of information I didn't know. You don't know what you don't know.
Last edited by Reloder28; 05/03/16.
By the way, in case you missed it, Jeremiah was a bullfrog.
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Joined: Jan 2007
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Campfire 'Bwana
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Campfire 'Bwana
Joined: Jan 2007
Posts: 35,900 |
About 2 years ago I used a then-current batch of H4831SC, 61.5g of it with a 150g SST. It was so compressed it pushed the bullet out a little overnight.
Compared to many manuals I thought the velocity was very mild. 2990fps from the 23.5" bbl.
When I mention manuals, I mean that I don't remember ever seeing a 61+g load of that powder with a 150g bullet.
I worked up to the load gradually of course. Lighter powder charges had been very underwhelming. Bobnob: interesting because I have never seen that much H4831 recommended with a 150 gr bullet. The velocity is very good, too. Got a feeling lots of little things added up there...does the SST have short bearing surface maybe? Other things to consider besides the powder are what kind of barrel was that? Were you throated on the long side? That's a barrel I would like to slug for groove diameter. A loose barrel and longsih throat can take heavier powder charges than a tighter barrel IME. Little things we don't consider sometimes add up.
The 280 Remington is overbore.
The 7 Rem Mag is over bore.
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Joined: Feb 2003
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Campfire Outfitter
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Campfire Outfitter
Joined: Feb 2003
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Bob I bet tons of H4831 got burned in the 30/06, and other cartridges for which it was not exactly optimum, mostly because it was abundant, available, and cheap. They'd stuff it into everything.. The 270 will swallow everything from 4064 to RL25 IME with the medium-slow to slow showing best with bullets 130 gr and up. I've only used R17 in the 270 with the 110 Barnes where it did well. I'd expect the powder to do good in the 30/06, the 338 Win Mag, and likely the 375 H&H as well. Personally I defaulted to H4350 in the 30/06 with no reason to change so far. Bob, what powder would you use for a 150gr. partition load in the old 270 win? I'm like you and love H4350 in the 30-06. It's so damn resistant to temp swings that it isn't even funny. I'd like to get the same results from my 270 with 150gr. partitions. I shot that rifle yesterday and the velocity fluctuates quite a bit when the temp goes up or down. I finished up load development for my latest 270 shooting 150 gr Partitions. It got down to H4831 and H1000. 61.0 of H1000 was better than H4831 when I started shooting 5 shot groups. I use a drop tube and WW brass to get 61.0 in the case. Vel from my 24" Kimber is ~ 2925 ft/sec. IMR 7977 did fairly well as well. I could use H4895, H4350, H4831, H1000 for the rest of my life and be really happy.
Adversity doesn't build character, it reveals it.
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Campfire 'Bwana
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Campfire 'Bwana
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The 270 Win will utilize slower powders than we have come to accept as standard. H1000, RL25,7828 all work well IME.
bwinters good stuff!
The 280 Remington is overbore.
The 7 Rem Mag is over bore.
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Campfire 'Bwana
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Campfire 'Bwana
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Good info guys. Thanks... Any of you guys try magpro with a 150gr. partition? If so, how temp stable is that line of powder?? The Nosler reloading manual lists magpro as a good powder to use in the 270 with the 150gr. bullets.. I know there for a while, all I could find was magpro, IMR 4350 and H1000. Trying to find H4350 and H4831 was impossible, but now I'm seeing it on the shelves again.
I try to stick with the basics, they do so well. Nothing fancy mind you, just plain jane will get it done with style. You want to see an animal drop right now? Shoot him in the ear hole. BSA MAGA
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Campfire Outfitter
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Campfire Outfitter
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I've not tried it in the 270 but did in a couple 7 mags. It gives advertised velocity but lost ~ 75 ft/sec between 60 and 30 for me. I quit using it.
Adversity doesn't build character, it reveals it.
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Joined: Aug 2010
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Campfire 'Bwana
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Campfire 'Bwana
Joined: Aug 2010
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Thanks Bill. That's useful information. Looks like I need to find some H4831.. Damn!!
I try to stick with the basics, they do so well. Nothing fancy mind you, just plain jane will get it done with style. You want to see an animal drop right now? Shoot him in the ear hole. BSA MAGA
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Campfire Regular
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Campfire Regular
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Bobnob: interesting because I have never seen that much H4831 recommended with a 150 gr bullet. The velocity is very good, too. Got a feeling lots of little things added up there...does the SST have short bearing surface maybe?
Other things to consider besides the powder are what kind of barrel was that? Were you throated on the long side? That's a barrel I would like to slug for groove diameter. A loose barrel and longsih throat can take heavier powder charges than a tighter barrel IME.
Little things we don't consider sometimes add up.
Yeah I've mulled some of those things over in the past. I've never slugged the bore, but the throat isn't long. I can get into the lands with the 150g SST with the mag length a generous 3.375-ish. The loose bore diameter is a possibility. I got around it by just adding more 4831, then going to H4350 before more recently with the R17. Rifle is a Zastava aka Interarms X. It's an accurate rifle with 1.25moa with the worst of loads and a good 0.75 with a lot of loads.
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Joined: Jan 2007
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Campfire 'Bwana
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Campfire 'Bwana
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It can be hard to figure sometimes why some barrels will take those kind of charges....but some do. Keeps you guessing
The 280 Remington is overbore.
The 7 Rem Mag is over bore.
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Posts: 19,179
Campfire Ranger
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Campfire Ranger
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The 270 Win will utilize slower powders than we have come to accept as standard. H1000, RL25,****7828**** all work well IME.
Guys, it 'seems' to me that IMR 7828 is overlooked. I suggest y'all give it a try. Jerry
jwall- *** 3100 guy***
A Flat Trajectory is Never a Handicap
Speed is Trajectory's Friend !!
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Campfire Oracle
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Campfire Oracle
Joined: Aug 2009
Posts: 96,168 Likes: 5 |
In this FN Mauser .270,I'm using 59.8 grs of RL-26,Federal 210 Match primer and a 150 gr Nosler Partition. Getting 3010 fps from the 22" barrel.
Life Member SCI Life Member DSC Member New Mexico Shooting Sports Association
Take your responsibilities seriously, never yourself-Ken Howell Proper bullet placement + sufficient penetration = quick, clean kill. Finn Aagard
Ken
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Campfire Regular
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That's a beaut old rifle. If only those old guns could talk!
Good speed from R26 too.
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Campfire Oracle
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Campfire Oracle
Joined: Aug 2009
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Yeah,would love to stories of the hunts it's been on. Here's the info/link. http://www.alliantpowder.com/reload...ight=150&shellid=63&bulletid=367
Life Member SCI Life Member DSC Member New Mexico Shooting Sports Association
Take your responsibilities seriously, never yourself-Ken Howell Proper bullet placement + sufficient penetration = quick, clean kill. Finn Aagard
Ken
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Campfire Tracker
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Campfire Tracker
Joined: Sep 2007
Posts: 3,612 |
In this FN Mauser .270,I'm using 59.8 grs of RL-26,Federal 210 Match primer and a 150 gr Nosler Partition. Getting 3010 fps from the 22" barrel. Nice gun. I need to try some RL 26 what kind of compression are you getting with that load if any? I don't mind a compressed load as long as it isn't excessive.
Gerry.
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Joined: Aug 2009
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Campfire Oracle
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Campfire Oracle
Joined: Aug 2009
Posts: 96,168 Likes: 5 |
Life Member SCI Life Member DSC Member New Mexico Shooting Sports Association
Take your responsibilities seriously, never yourself-Ken Howell Proper bullet placement + sufficient penetration = quick, clean kill. Finn Aagard
Ken
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Campfire Tracker
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Campfire Tracker
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Thanks, there are some really good powders coming out these days.
Gerry.
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